Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e9fb540fcee5b24…

MALICIOUS

PDF

42.1 KB Created: 2020-08-17 17:40:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06ce7af16d9735a2463928e15c80d1ac SHA-1: ad1f31649726da5c2d65fe9369df3d5a19b7631b SHA-256: 0e9fb540fcee5b2468131e033640a29d0bbed552d67a76843bcadf225d3b74ea
162 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to known malicious redirector infrastructure (ttraff.ru). The document body, though heavily obfuscated, appears to contain text related to a mobile phone manual, suggesting a lure. The presence of numerous Shopify-hosted PDF links, while many are benign, contributes to a link farm pattern. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=alcatel+1x+mobile+phone+manual
    • http://sobixim.ejdilleyphotography.com/uploads/1/3/1/8/131871699/755079d0340c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/1471/7597/files/69232609593.pdf
    • https://cdn.shopify.com/s/files/1/0432/6391/8246/files/gadunivopabekadakedetoxal.pdf
    • https://cdn.shopify.com/s/files/1/0433/1569/1675/files/dizadonojoludot.pdf
    • https://cdn.shopify.com/s/files/1/0430/9411/4457/files/css_box_shadow_top.pdf
    • https://cdn.shopify.com/s/files/1/0438/2015/5037/files/44896186076.pdf
    • https://cdn.shopify.com/s/files/1/0428/8475/9711/files/nanusanekul.pdf
    • https://cdn.shopify.com/s/files/1/0432/5877/3662/files/43773665830.pdf
    • https://cdn.shopify.com/s/files/1/0437/0412/3557/files/40687767678.pdf
    • https://cdn.shopify.com/s/files/1/0429/9200/9365/files/fodonaxo.pdf
    • https://cdn.shopify.com/s/files/1/0439/1567/3752/files/16967982803.pdf
    • https://cdn.shopify.com/s/files/1/0440/4350/1733/files/ruruvajinuvekuvolerelugut.pdf
    • https://cdn.shopify.com/s/files/1/0428/4953/4111/files/the_curious_researcher.pdf
    • https://cdn.shopify.com/s/files/1/0428/3518/1724/files/fundamental_of_accounting_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/5802/8959/files/69593033556.pdf
    • https://cdn.shopify.com/s/files/1/0437/5465/1799/files/kanas.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_off000051a2.bin
ce22c8eaa1f53a77d563481fc3f0abc202627ce0e69ac912df19b60822d178aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51A2 3724 bytes
font_01_sfnt_off00005edf.bin
9f9ea8db2f687397ed1e4c24c21a9bdf198e8b4512c2b1238120b552f2abe151		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EDF 5148 bytes
font_02_sfnt_off00007044.bin
00c68addc520c8800fea20267f5f46c3982adeb304b1edb0e14a03e353d1a5db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7044 13712 bytes

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