Malicious PDF — malware analysis report

Static analysis result for SHA-256 68ad638a4f89e200…

MALICIOUS

PDF

42.9 KB Created: 2020-08-30 05:29:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72f42b5865ffc7a6bec2d7b588805a0a SHA-1: 910010cfb868a56477b2199eff764d9a3bb8b6cb SHA-256: 68ad638a4f89e2004d0dc6f965419fcd58e88c0c14b72f28f7f00cf4775943ba
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one identified as a malicious redirector pointing to 'ttraff.ru'. The document body and heuristics suggest a lure related to 'anonytun achi apk mod', likely intended to trick users into downloading malware or visiting a phishing site. The presence of many Shopify links, some flagged as benign, indicates a link farm strategy to obscure the malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/wix?keyword=anonytun+achi+apk+mod
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/8235/7663/files/medical_biochemistry_books_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/4653/5322/files/59452284832.pdf
    • https://cdn.shopify.com/s/files/1/0428/9013/3663/files/lugegavoket.pdf
    • https://cdn.shopify.com/s/files/1/0431/7652/5984/files/61966288985.pdf
    • https://cdn.shopify.com/s/files/1/0434/5731/4977/files/79148126508.pdf
    • https://cdn.shopify.com/s/files/1/0429/3849/9235/files/9720454618.pdf
    • https://cdn.shopify.com/s/files/1/0430/3349/3658/files/kuxiviralejelaxe.pdf
    • https://cdn.shopify.com/s/files/1/0435/2458/7679/files/lumipujezegimigaxikoveme.pdf
    • https://cdn.shopify.com/s/files/1/0431/0047/1456/files/forexuxafade.pdf
    • https://static.usrfiles.com/ugd/93c935_54e4f5cb873545e588c7b8596267738e.pdf
    • https://static.usrfiles.com/ugd/1c8c6c_2ff2136c088949efae5f885333afee50.pdf
    • https://static.usrfiles.com/ugd/32acb1_09c79145bab645d8a2c89f453e0d8973.pdf
    • https://static.usrfiles.com/ugd/b8c837_24eca2a73b324c8b913d0c713845b476.pdf
    • https://static.usrfiles.com/ugd/b8c837_7defd885b47d499c902e3ab214b45bd3.pdf
    • https://static.usrfiles.com/ugd/b8c837_d29c27e147c94f83a57bab91cceceba3.pdf
    • https://static.usrfiles.com/ugd/f96b02_b03eb425bdb645d298a730dd3f80cbba.pdf
    • https://static.usrfiles.com/ugd/b8c837_b89691c8310846be9834a7ea135f739c.pdf
    • https://static.usrfiles.com/ugd/b8c837_30fa000b8d294e1c9666b220a46eef74.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_off000069fe.bin
cd83132b757d8c1ee620ef5fa530608a15a73b08964026f412c7a987346c0424		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69FE 5164 bytes
font_01_sfnt_off00007b6c.bin
95bb92f996d17cef65637778fee588ddde9dafb8f2da2781242006c1e290d45e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B6C 10444 bytes

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