Malicious PDF — malware analysis report

Static analysis result for SHA-256 078cdcd0c296cf54…

MALICIOUS

PDF

55.2 KB Created: 2020-08-31 09:07:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 085fec8d9737f0aa9f900e15ae87ecba SHA-1: dcc26cfb51b7822130a12b3697e0bcaa55db7918 SHA-256: 078cdcd0c296cf54eeb04dc7772b35b341177de863634992d29d53f5e0099507
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to Shopify domains hosting other PDFs, but one critical link directs to a known malicious redirector. This suggests a link farm or SEO poisoning tactic to drive traffic to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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=analisis+de+nodos+ejercicios+resueltos+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/7727/0692/files/buboxawodibezowod.pdf
    • https://cdn.shopify.com/s/files/1/0428/1047/4663/files/manly_coastalwatch_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/6576/1176/files/50095378742.pdf
    • https://static.usrfiles.com/ugd/b8c837_db6e2c4000844511928af7324fb36554.pdf
    • https://cdn.shopify.com/s/files/1/0433/9158/2357/files/bhagavad_gita_chapter_14_slokas_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0433/0074/9467/files/rulerivadarimadopedupexo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5863/4650/files/soromiwibugemifafuwesozu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9812/0094/files/antenna_theory_analysis_and_design_3rd_edition_solution.pdf
    • https://static.usrfiles.com/ugd/d63aaf_4eb1d118877f45558d6ee1c92dc2d363.pdf
    • https://static.usrfiles.com/ugd/97368a_5fdfd477d6de43e5aa66f7946c0655cf.pdf
    • https://static.usrfiles.com/ugd/585b1d_a7debfa2e56142ccbb326bd1413fea97.pdf
    • https://static.usrfiles.com/ugd/b8c837_ebaebab9db8e494c85fdf9b5bd3c9800.pdf
    • https://static.usrfiles.com/ugd/b8c837_2e20cf22dcff4ccd9db6f99ace2f907b.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a56.bin
ca423b9c5b3e47692dfbefa147b3689690fa29e94cf83775cedeeaa339135e62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A56 5096 bytes
font_01_sfnt_off00007bb6.bin
5254da45335101d2f8e90cbedbcbefe37ea29948a3d02fed0f4a99fb070686ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB6 15280 bytes
font_02_sfnt_off0000aa11.bin
cc191171434aedc4fac379d7a46666b820d73ccbb673cd9ecd12d257dd763201		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA11 16308 bytes
font_03_sfnt_off0000bf9b.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF9B 4324 bytes

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