Malicious PDF — malware analysis report

Static analysis result for SHA-256 10732fde6f687458…

MALICIOUS

PDF

64.6 KB Created: 2020-08-14 23:15:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75e7723ea4351f70c8f4df3aa32951be SHA-1: c3d35b43b810c6300d28ad62388f650496dc375b SHA-256: 10732fde6f687458a91778b50f7c0a5e7bac74eb7c4edac0c419a824458d3fe0
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://ttraff.com/pify?keyword=eng+report+definition'. Additionally, it features a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URLs and the redirector link indicate a malicious intent to direct users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=eng+report+definition
    • http://files.alteredfive.com/uploads/1/3/2/6/132681931/2306248.pdf
    • http://files.mtnspinweave.org/uploads/1/3/0/7/130739419/247dba6ea7e70ce.pdf
    • http://maxun.nextstepsdaycare.net/uploads/1/3/1/3/131398020/db1531e182.pdf
    • http://files.thoughtfulfilmrants.com/uploads/1/3/2/7/132740270/pirusogabidef.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/8933/7256/files/bhagavad_gita_chapter_1_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0437/3633/4501/files/kubodibiwapagubuvepo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fezusagofetivori.pdf
    • https://cdn.shopify.com/s/files/1/0432/2036/9576/files/sigozajexijefi.pdf
    • https://cdn.shopify.com/s/files/1/0435/6364/7131/files/koluxurenurununebuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70277109097.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wososopozabe.pdf
    • https://cdn.shopify.com/s/files/1/0435/4896/7061/files/wirelose.pdf
    • https://cdn.shopify.com/s/files/1/0431/5057/3724/files/macklemore_the_heist_zip.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://scripts.sil.org/OFL
    • http://www.gnu.org/licenses/gpl.html
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000729b.bin
8dc356dca816a0b16a6ca716c3a1f75291a29d1e7f2b4b391859db4edf27f0fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x729B 4256 bytes
font_01_sfnt_off000081a8.bin
9f226dbd08f46e9b81e80ca14cd94b16976e2ae34218cd83860ae773216855f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81A8 4532 bytes
font_02_sfnt_off0000910d.bin
cb69658e1f52e01aa159683abf284d6a375828d481a5efc381e6a12390624a18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x910D 8560 bytes
font_03_sfnt_off0000a8ac.bin
fdabe8741a5647fb3f936ad3a40a912a91f5d9c0993ddca4f5861f95a182faae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8AC 10976 bytes
font_04_sfnt_off0000cd17.bin
d21ca3938f64cd3f53be3daf29bf11fb68c9371b8e442c103dd523357b1fb765		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD17 17276 bytes
font_05_sfnt_off0000e617.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE617 4324 bytes

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