Malicious PDF — malware analysis report

Static analysis result for SHA-256 60a05944f6a27c9d…

MALICIOUS

PDF

48.3 KB Created: 2020-08-30 08:08:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ab95a88103143b3f4cbf83cecfd7eeb SHA-1: 5a8eb37462b210887f0005da62935d3a1374508c SHA-256: 60a05944f6a27c9d7bcc1d47d17a85a9c3bb7b571b711ea03ae27b9c4dae341f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a significant number of embedded links, with one pointing to a known malicious redirector. The presence of numerous links to other PDFs hosted on Shopify suggests a link farm or a method to distribute further malicious content. The ML classifier also strongly indicated maliciousness.

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=sch%25C3%25A9ma+tube+digestif+%25C3%25A0+compl%25C3%25A9ter
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/3636/0351/files/gibominoxuvurenulobi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9974/1596/files/dafakizifatiwagekusal.pdf
    • https://cdn.shopify.com/s/files/1/0430/9932/4580/files/63228360613.pdf
    • https://cdn.shopify.com/s/files/1/0431/4287/3245/files/overlord_volume_11.pdf
    • https://cdn.shopify.com/s/files/1/0441/4255/9384/files/vagepobedaxoxonitesegev.pdf
    • https://cdn.shopify.com/s/files/1/0462/3197/8138/files/jogoxogodabevoruboti.pdf
    • https://cdn.shopify.com/s/files/1/0432/8026/9462/files/77519740613.pdf
    • https://cdn.shopify.com/s/files/1/0437/0389/4171/files/garubufavoripa.pdf
    • https://cdn.shopify.com/s/files/1/0460/7603/5236/files/22798828536.pdf
    • https://static.usrfiles.com/ugd/b8c837_0fe6ca848f8b444f8be2538d1539486f.pdf
    • https://static.usrfiles.com/ugd/f09a9d_fa50da5fe3d446908524664c4055fa17.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000788b.bin
5e9c1c18438dcb9998b5e1d7d9551f0b0e6252de391641dd25cded6987e53636		 pdf-font-stream PDF embedded font (sfnt) at offset 0x788B 6188 bytes
font_01_sfnt_off00008c97.bin
39ecf79ad0f56088af19b109c4a7527022afffcd399c2613873fe3fe27a3bc35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C97 12344 bytes

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