Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bdb9f54827b8975…

MALICIOUS

PDF

46.4 KB Created: 2020-08-30 10:45:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 784e7874eb65501d2a876808a22590f9 SHA-1: 506f5d6188b9aa4c7c0f27dbfa8661dc8c6b2ef7 SHA-256: 6bdb9f54827b8975dcabacaf9f6bd05a0c363ea71f74ae430f23eafc3da0b48c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous external links, many pointing to Shopify and usrfiles.com domains, suggesting a SEO poisoning or link farm tactic. One prominent link, 'https://ttraff.cc/wix?keyword=how+to+shoot+like+a+navy+seal+pdf+fr', is flagged as a malicious redirector. The document body, though partially garbled, contains text related to 'how to shoot like a navy seal pdf fr', likely a lure to encourage clicks on the embedded malicious link.

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=how+to+shoot+like+a+navy+seal+pdf+fr
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/3292/0732/files/zukixaxajudofaredakowa.pdf
    • https://cdn.shopify.com/s/files/1/0437/0163/3177/files/saxararosemusuvo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8838/0061/files/44768870547.pdf
    • https://cdn.shopify.com/s/files/1/0428/5405/6095/files/gorillaz_gorillaz_zip_download.pdf
    • https://static.usrfiles.com/ugd/a107db_08606452eee34e37881cae491db9f9e5.pdf
    • https://static.usrfiles.com/ugd/510a18_604102487cc349078a9c7de476940b32.pdf
    • https://static.usrfiles.com/ugd/e745be_a57b609c9054435e9e07c4e7521b1c69.pdf
    • https://static.usrfiles.com/ugd/b8c837_e687bd6877354514be288505e5b4670b.pdf
    • https://static.usrfiles.com/ugd/b8c837_9c89470390f64abf9e233ce32c306a4c.pdf
    • https://cdn.shopify.com/s/files/1/0438/3476/9565/files/kogunuvabunozugebofovakut.pdf
    • https://cdn.shopify.com/s/files/1/0433/4980/3162/files/58586728183.pdf
    • https://cdn.shopify.com/s/files/1/0430/6078/9409/files/xodugaxelisomuragosix.pdf
    • https://cdn.shopify.com/s/files/1/0430/6845/7113/files/83609718885.pdf
    • https://cdn.shopify.com/s/files/1/0429/9928/3861/files/lumeziloduzowevaluz.pdf
    • https://cdn.shopify.com/s/files/1/0431/3861/3399/files/newspaper_article_structure.pdf
    • https://cdn.shopify.com/s/files/1/0427/5830/8006/files/arbitration_and_conciliation_act_1996_notes.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65069223210.pdf
    • https://cdn.shopify.com/s/files/1/0437/3620/3415/files/business_success_tips.pdf
    • https://cdn.shopify.com/s/files/1/0430/6881/7562/files/ssc_admit_card_2017.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006829.bin
4ac9e483ed3976252139c83695069c7bfe6a75ac8dce71ba7236487bfed37044		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6829 5196 bytes
font_01_sfnt_off000079dc.bin
ef76333f01248eb494d0683ab8b748803b75cde7afc6d10b9ca257e8871c332e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79DC 10580 bytes
font_02_sfnt_off00009df6.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DF6 4324 bytes

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