Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e99412ac65ad183…

MALICIOUS

PDF

53.7 KB Created: 2020-08-30 22:06:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44663e9f621bf308919263b76a0b121b SHA-1: 79bc6268e78b966a725be34a1e99aed16efdba93 SHA-256: 7e99412ac65ad183b2ea089e674c61d23d538e20d96a4409ca51bc1981989b75
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure. It also exhibits a PDF link farm heuristic, with numerous external links, many pointing to Shopify-hosted PDFs. The primary malicious URL identified is https://ttraff.cc/wix?keyword=destiny+2+pc+clan, which is flagged as a redirector. The document body contains obfuscated text and the malicious URL, suggesting an attempt to disguise its true purpose.

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=destiny+2+pc+clan
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0438/2549/6221/files/sahih_bukhari_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8914/9608/files/vadisasuzolefawekapebi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9044/4445/files/xibogageje.pdf
    • https://cdn.shopify.com/s/files/1/0431/8344/0033/files/97739386258.pdf
    • https://static.usrfiles.com/ugd/7e6083_5230115ede3e4d3f9a227b0c0c2ee78e.pdf
    • https://cdn.shopify.com/s/files/1/0436/4677/9552/files/23535340569.pdf
    • https://cdn.shopify.com/s/files/1/0427/8334/2748/files/lajemenivimisufijufezom.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/finawuwimexubetusilifi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0157/6604/files/torameposivogurirokorol.pdf
    • https://static.usrfiles.com/ugd/b11f6d_1bee1c16dc6e40ed8982075d5438074e.pdf
    • https://static.usrfiles.com/ugd/b8c837_f52ec25b35d0407d8f27524e9b91a89d.pdf
    • https://static.usrfiles.com/ugd/0e9fc2_17fd098e24f14618b819b057b926f58c.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000689c.bin
7469ce5a2a14ae8541910f6d79e3b72a139d01615351dd7c5c779c61da1bbfef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x689C 4744 bytes
font_01_sfnt_off000078ca.bin
d85b33c3f797a3b8644ef82fe00cc2c05692154eb2385c1435329cff54dc07ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78CA 2052 bytes
font_02_sfnt_off000081a7.bin
1d18534733479c870a78c46a90b83ed8aff410c3511f6838c5b83347f92bfa48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81A7 1964 bytes
font_03_sfnt_off00008b01.bin
9d91d7538fcfce7920e32d5a63033aede44e9b236424f2e1c36882fa0a592e2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B01 15392 bytes
font_04_sfnt_off0000bb3e.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB3E 4324 bytes

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