Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7674849f84104c0…

MALICIOUS

PDF

45.2 KB Created: 2020-08-23 01:02:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0cf5a3daecd9ebe74619b65c052a9191 SHA-1: f518d09891a0df60dc285ba41e9953f780ffa67c SHA-256: c7674849f84104c040b825b152684549e204ffdbaf27af947d86d05dfa6662ae
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with a critical heuristic firing indicating a link to a known malicious redirector. The document body, though heavily obfuscated, also contains the same redirector URL and numerous other URLs pointing to Shopify and other domains, suggesting a link farm or SEO poisoning attempt. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the primary malicious activity appears to be the distribution of malicious links.

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.com/pify?keyword=white+transparent+background+color+code+android
    • http://popusow.ilaproject.com/uploads/1/3/0/7/130740596/7f4ce527.pdf
    • http://files.camillahouse.com/uploads/1/3/2/6/132696155/pavipuxaj_murotuwi_kamuxi.pdf
    • http://files.a1homestay.com/uploads/1/3/1/0/131070216/nelogitox-nogos.pdf
    • http://sevuwesog.whitefishcreations.com/uploads/1/3/1/4/131437462/gizibogan-xawuje-buxuroregel-bikid.pdf
    • http://files.theinsurancecorners.com/uploads/1/3/2/6/132696113/pijubugew-konow-maruwizanewiru.pdf
    • https://cdn.shopify.com/s/files/1/0427/4218/6150/files/thomas_bernhard.pdf
    • https://cdn.shopify.com/s/files/1/0450/6284/8664/files/givugixorusojemomotiwo.pdf
    • https://cdn.shopify.com/s/files/1/0439/7678/6078/files/tebaxuwudawaduge.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/laser_cut_sheet_metal_designs.pdf
    • https://cdn.shopify.com/s/files/1/0441/2804/3160/files/60442717264.pdf
    • https://cdn.shopify.com/s/files/1/0432/4301/2256/files/makalah_tentang_bblr.pdf
    • https://cdn.shopify.com/s/files/1/0433/6012/5080/files/55807634345.pdf
    • https://cdn.shopify.com/s/files/1/0429/2483/4975/files/rukiviga.pdf
    • https://cdn.shopify.com/s/files/1/0427/7056/3239/files/xuregakumeniwubot.pdf
    • https://cdn.shopify.com/s/files/1/0462/6310/7738/files/75732713176.pdf
    • https://cdn.shopify.com/s/files/1/0431/1928/0288/files/67052854752.pdf
    • https://cdn.shopify.com/s/files/1/0432/6454/0835/files/disokirobusaxiwupitefipo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1243/1776/files/amazing_grace_chords_in_c.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bodadajigewodozisidezufe.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_off00006218.bin
b8093c7fb2174b0a07950e8cb9d95f19efccafb2126dca2b49125162d2df1a5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6218 5552 bytes
font_01_sfnt_off000074ec.bin
723de5e532cd3141b8edbc8a864d8aa8b62058c18fc4880a8ebc50cf12ee0579		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74EC 16104 bytes

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