Malicious PDF — malware analysis report

Static analysis result for SHA-256 acdb14ef5a78665d…

MALICIOUS

PDF

47.0 KB Created: 2020-08-29 11:37:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1fc3b4cebfb68ab068f15f2c7f74463c SHA-1: 1db79604442858602617765c1a91374aef23f465 SHA-256: acdb14ef5a78665dd67dbcdab70ca5f63c6edf9a2635aaecc7d2dfb741d73fce
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to a '2019 nissan murano review' and the malicious URL 'https://ttraff.cc/wix?keyword=2019+nissan+murano+review', suggesting a lure to a malicious site. The presence of a large number of external PDF links also points towards SEO poisoning or a link farm strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/wix?keyword=2019+nissan+murano+review
    • https://static.usrfiles.com/ugd/b8c837_d425d4761e074087b1b98244ea59af43.pdf
    • https://static.usrfiles.com/ugd/b8c837_c8c9b2be1bce47338e111739fe604b0b.pdf
    • https://static.usrfiles.com/ugd/b8c837_08e45de8b96645c083bf5be921063285.pdf
    • https://static.usrfiles.com/ugd/b8c837_2dd8fe26987a44559f20127366d93054.pdf
    • https://static.usrfiles.com/ugd/b8c837_2cbb2fc759b5446e945b3c9197f85555.pdf
    • https://cdn.shopify.com/s/files/1/0437/9469/4304/files/ios_game_center_on_android.pdf
    • https://static.usrfiles.com/ugd/b8c837_2fcfb4a00c3547b6955354f727d50ad7.pdf
    • https://static.usrfiles.com/ugd/b8c837_0b72c99a7be94c8e8a3f9b615f8286df.pdf
    • https://static.usrfiles.com/ugd/b8c837_2c2ee0dedd6a448a91324ba382142939.pdf
    • https://static.usrfiles.com/ugd/b8c837_f601a48014ad4ce6a86afe8b1550cd5c.pdf
    • https://cdn.shopify.com/s/files/1/0435/0817/0918/files/tadipijug.pdf
    • https://cdn.shopify.com/s/files/1/0434/4784/5030/files/aziz_ansari_modern_romance_free.pdf
    • https://cdn.shopify.com/s/files/1/0440/1407/6069/files/konexatolesidiwakokaku.pdf
    • https://cdn.shopify.com/s/files/1/0436/5395/5742/files/51730360796.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c79.bin
b8bce7febb86f90f2202f4510d66bc8295ff16897e1f2a53f602f9ff51596459		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C79 5140 bytes
font_01_sfnt_off00007dd5.bin
ec0749d772a3dfdb61311d67f1f028245f1f08582b466306f73d898295085f63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DD5 10324 bytes
font_02_sfnt_off0000a115.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA115 4324 bytes

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