Malicious PDF — malware analysis report

Static analysis result for SHA-256 00afd69c14c9f6a5…

MALICIOUS

PDF

46.2 KB Created: 2020-08-18 20:53:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8243bba5c88e64e3a1f8298a1d0c1ee9 SHA-1: 335b385c2c25813248af85a95a1962c7eb97b93c SHA-256: 00afd69c14c9f6a5c518492684adbbf551cde54ffbad70312c7afb690b5f2b55
154 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to external PDF files, characteristic of a link farm. One critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.cc', which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the same redirector URL and a reference to 'aerobic dance workout for beginners mp4', suggesting a lure.

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=aerobic+dance+workout+for+beginners+mp4
    • http://files.berryessahoa.com/uploads/1/3/1/6/131606619/gajufisixaji.pdf
    • http://files.actcdc.org.au/uploads/1/3/0/7/130775309/zobikagoler.pdf
    • http://files.stephanef.studio/uploads/1/3/0/9/130969331/pasotisi-murugapesusobi.pdf
    • http://lumem.cakefuntasie.com/uploads/1/3/1/4/131406947/4137785.pdf
    • http://files.alexstudio.bg/uploads/1/3/1/1/131164448/875fbb5e4c12d5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0441/0625/2440/files/tigulekavis.pdf
    • https://cdn.shopify.com/s/files/1/0429/7608/4117/files/75697268480.pdf
    • https://cdn.shopify.com/s/files/1/0431/1361/1413/files/18401835786.pdf
    • https://cdn.shopify.com/s/files/1/0429/3653/3151/files/1482749499.pdf
    • https://cdn.shopify.com/s/files/1/0437/3712/0933/files/27786371074.pdf
    • https://cdn.shopify.com/s/files/1/0431/8937/1040/files/lauryn_hill_unplugged.pdf
    • https://cdn.shopify.com/s/files/1/0430/6065/8333/files/lilizafujuwobon.pdf
    • https://cdn.shopify.com/s/files/1/0431/0636/9703/files/kamus_bahasa_jawa_kromo_inggil.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6925/files/37095463209.pdf
    • https://cdn.shopify.com/s/files/1/0447/4834/1399/files/quantitative_aptitude_questions_and_answers_for_ssc.pdf
    • https://cdn.shopify.com/s/files/1/0432/3786/7680/files/40340457042.pdf
    • https://cdn.shopify.com/s/files/1/0431/6980/8548/files/nuradovanotinidil.pdf
    • https://cdn.shopify.com/s/files/1/0432/6300/0736/files/mejufanitus.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_off000074e8.bin
f2a1c9dddce35a9b9ae9f9f8ca9a3d732c6f43c395c6eaf367c033ed3010da39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74E8 5816 bytes
font_01_sfnt_off000088b4.bin
314f193a323cbcf3f0ff4f534d473feda588fda501d73e331f2aad8e05342686		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88B4 10072 bytes

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