Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2f977daa6465e4b…

MALICIOUS

PDF

62.0 KB Created: 2020-08-04 06:27:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: efd35701d0db79181c496a8e75536ff1 SHA-1: 3f824df095b6f2de75fe6a96bf3c3d17609e9b04 SHA-256: a2f977daa6465e4bc2904cc2ccded5761042309c52bcdb019ae8560161cb3c62
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=manualidades+con+reciclaje+paso+a+paso+pdf'. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to Shopify domains hosting PDF files. The ML classifier strongly flagged this PDF as malicious. The document body contains obfuscated text and the malicious URL, suggesting a lure to a phishing or malware distribution site.

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.ru/pify?keyword=manualidades+con+reciclaje+paso+a+paso+pdf
    • http://files.wralfreedomballoonfest.com/uploads/1/3/2/6/132695354/844624b3fb0041.pdf
    • http://bawiwa.alliancebulldogs.org/uploads/1/3/1/1/131164100/nulexinu-renepogexe-wurivarivirepon.pdf
    • http://files.malkaschallheim.com/uploads/1/3/1/4/131407469/wuzit_magiwibapojad_gerevebapuliba.pdf
    • http://files.canaseragafestival.com/uploads/1/3/1/4/131454304/kaliwojexutamejame.pdf
    • http://files.samosetband.com/uploads/1/3/2/6/132695329/1909638.pdf
    • https://cdn.shopify.com/s/files/1/0428/6211/7030/files/ford_aerostar_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/9277/8916/files/my_boss_my_hero.pdf
    • https://cdn.shopify.com/s/files/1/0430/2811/9706/files/kakifufuf.pdf
    • https://cdn.shopify.com/s/files/1/0436/3033/0016/files/11152960744.pdf
    • https://cdn.shopify.com/s/files/1/0430/9817/7693/files/fallout_new_vegas_mod_list.pdf
    • https://cdn.shopify.com/s/files/1/0432/4245/5197/files/defanu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7941/7504/files/numugananobeduveva.pdf
    • https://cdn.shopify.com/s/files/1/0435/8730/5629/files/84240919555.pdf
    • https://cdn.shopify.com/s/files/1/0441/2496/2968/files/ejercicios_de_algebra_booleana.pdf
    • https://cdn.shopify.com/s/files/1/0430/9454/0452/files/xedabusuvugotexodekerumaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/4183/2615/files/61085305133.pdf
    • https://cdn.shopify.com/s/files/1/0438/5495/4656/files/student_council_president_speech.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/gokusakivoxexenegodib.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b280.bin
5820e42d8ae6cab3cf439a25cbbf8c0326fb93168b39ca45bf1298bc3cbdd63a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB280 5228 bytes
font_01_sfnt_off0000c46a.bin
e6c322745555d4e98c2ca260b85e265fe7f3b3988b19133e2f4827dfd66d7427		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC46A 11208 bytes

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