Malicious PDF — malware analysis report

Static analysis result for SHA-256 f009c8a6f5205834…

MALICIOUS

PDF

93.0 KB Created: 2020-08-08 02:23:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d6056a2692cbc796d2847e2a41eae4b SHA-1: 37d14800802105b32dcc878020bef4bcd312c68d SHA-256: f009c8a6f5205834fc6f321019a0516e1b5ed46499f2209224d4c73c2ce9a3a7
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to ttraff.cc. Additionally, it exhibits characteristics of a PDF SEO link farm, with numerous external links, many hosted on cdn.shopify.com. The ML classifier also strongly flagged this PDF as malicious. The embedded URL in the document body, 'https://ttraff.cc/pify?keyword=altruistic+behavior+pdf', is the primary indicator of malicious intent, likely serving as a lure for phishing or malware delivery.

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/pify?keyword=altruistic+behavior+pdf
    • http://files.mthoodwranglers.com/uploads/1/3/1/8/131856945/47ebd5d122bcdda.pdf
    • http://files.restore-ministries.net/uploads/1/3/1/3/131398547/kurulikekerazigeje.pdf
    • http://files.aishasuniquecosmetics.com/uploads/1/3/0/7/130776183/9757417.pdf
    • http://files.thefrontporchgardensandgifts.com/uploads/1/3/2/8/132815872/a5c647.pdf
    • https://cdn.shopify.com/s/files/1/0430/9054/2753/files/6486476474.pdf
    • https://cdn.shopify.com/s/files/1/0432/1506/1153/files/27084189551.pdf
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/english_sentence_with_tamil_meaning_in.pdf
    • https://cdn.shopify.com/s/files/1/0434/0911/3242/files/miocardiopatia_dilatada_adultos.pdf
    • https://cdn.shopify.com/s/files/1/0434/7723/7913/files/34851564172.pdf
    • https://cdn.shopify.com/s/files/1/0427/5326/1724/files/26674178268.pdf
    • https://cdn.shopify.com/s/files/1/0428/9232/9116/files/povalakelofiwixewepu.pdf
    • https://cdn.shopify.com/s/files/1/0436/0683/5358/files/photoshop_cs6_for_dummies_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/7788/6367/files/99858339659.pdf
    • https://cdn.shopify.com/s/files/1/0431/5181/8918/files/adjetivos_posesivos_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/8043/3302/files/gramatyka_jzyka_angielskiego_w_piguce.pdf
    • https://cdn.shopify.com/s/files/1/0429/5501/4297/files/wosomipurojipare.pdf
    • https://cdn.shopify.com/s/files/1/0431/1692/0996/files/rajabigokopabis.pdf
    • https://cdn.shopify.com/s/files/1/0433/5039/2984/files/15710224243.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_off000118ba.bin
6c66b40ed2bfad7d1795a523d7339781c0fcdb2ed66ba550e9db4e4b683d282d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118BA 5432 bytes
font_01_sfnt_off00012b34.bin
2397abbea5e3eee572de6e791289edfafc7a53deee90f4c3008f5a942fc0bf70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B34 10776 bytes
font_02_sfnt_off00014fff.bin
6534457c7e185cf0c58b5fa96d80f082fd21de6c52981b45182f83d4296ade8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14FFF 16452 bytes

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