Malicious PDF — malware analysis report

Static analysis result for SHA-256 87c01cdd36d2965f…

MALICIOUS

PDF

72.4 KB Created: 2020-08-03 05:03:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e05d09cb4fc1d7a7deaef8db109c5d31 SHA-1: d5e796e7ff9108bee9325328a6bb82f35f749db6 SHA-256: 87c01cdd36d2965f96518348c8536f8f34aca0a84ce846dc21f49f31363d808d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to a link farm designed to redirect users to malicious infrastructure. The primary malicious URL identified is https://ttraff.com/pify?keyword=lenny+face+middle+finger, which is flagged as a known malicious redirector. The document body contains garbled text and a reference to the malicious URL, suggesting an attempt to obfuscate the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=lenny+face+middle+finger
    • http://files.toddpellandphotography.com/uploads/1/3/0/9/130969548/115791.pdf
    • http://files.quapawcattlecompanystore.com/uploads/1/3/1/0/131070572/6730608.pdf
    • http://files.sarastipsypies.com/uploads/1/3/0/7/130740521/zodisejafurobamuxe.pdf
    • http://files.mscalbanyga.com/uploads/1/3/1/1/131163684/c9d06e6a30f2e.pdf
    • http://fedorahosted.org/lohit
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.thdl.org/http://www.thdl.org/Tibetan
    • http://www.opentle.org
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/3038/8642/files/42749752154.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97697777452.pdf
    • https://cdn.shopify.com/s/files/1/0430/7920/5013/files/jabagewilinawasajewebat.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tikifulodu.pdf
    • https://cdn.shopify.com/s/files/1/0437/7211/7141/files/93862359589.pdf
    • https://cdn.shopify.com/s/files/1/0429/9712/1178/files/general_chemistry_mcquarrie_4th_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/29878061118.pdf
    • https://cdn.shopify.com/s/files/1/0436/0008/5149/files/440842969.pdf
    • https://cdn.shopify.com/s/files/1/0430/4509/3533/files/livesusuboloviwofew.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65545430121.pdf
    • https://cdn.shopify.com/s/files/1/0430/5013/9801/files/vekanimamojexepimetine.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.htmlTibetan
    • http://www.gnu.org/licenses/gpl.html
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/copyleft/gpl.html

Extracted artifacts 11

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00007fd5.bin
3cda33e86397f8defed18490b5f25de88393a219c9c5bc6c765397dcf1a5fda0		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x7FD5 1788 bytes
stream_009_off0000c083.bin
6562ddcd20bb60c4fd57acb397c39ee48b9e4ba6bf065a8de3becea35f4002d6		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xC083 19568 bytes
font_00_sfnt_off00004dd2.bin
70734fee2a96355d4eccf666cbf4f79656d47f3740347b677d2fb26c936436c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DD2 4524 bytes
font_01_sfnt_off00005deb.bin
901e0b88e1e8882d902f132a974215a7ad684c49955482903f275b5750def446		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DEB 4804 bytes
font_02_sfnt_off00006e28.bin
90f5ced83addfbc5c39873d5da9b876fc788cbae8de3ea08fc1499e3c9e92ce6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E28 8904 bytes
font_04_sfnt_off000088f5.bin
bb075a3111a5b70f8158e38c43f552d65d4eb4aa024be95d46b795282407b9e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88F5 5756 bytes
font_05_sfnt_off00009760.bin
ff7c688095d07c36ef0793c15386b6cc6e09d4dfb19fa18183d74864a9c83113		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9760 11800 bytes
font_07_sfnt_off0000e140.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE140 4324 bytes
font_08_sfnt_off0000ef40.bin
a8c63f0e61ff85604de28fef8e3e47385d9d983aeb94ca31418bccf4c46212f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF40 2376 bytes
font_09_sfnt_off0000f8df.bin
17bd6aa876b24718b3a3b86dbc75f09cd009f311a05a65e89133ab522f71e96f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8DF 6092 bytes
font_10_sfnt_off00010801.bin
e2a7519d56ec97ee7cf3f08ecd02e7a31c6afce16374ca05e5dc62a52fbb875a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10801 1868 bytes

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