Malicious PDF — malware analysis report

Static analysis result for SHA-256 f056a1b702707f4b…

MALICIOUS

PDF

48.9 KB Created: 2020-08-07 14:42:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4ac61fa2d484d1712fad48e584e3ef6 SHA-1: 10a6f2af120ecca32838ea6595536ff4b03fc403 SHA-256: f056a1b702707f4b13f39112b49ba307c663c20502b044adf0e6cdbba5368b93
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a link farm pointing to a redirector service. The primary URL, 'https://ttraff.cc/pify?keyword=approximation+questions+for+ibps+clerk+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it is the intended lure. The presence of numerous links to Shopify domains, while marked as benign, likely serves to add legitimacy or distribute the malicious content.

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=approximation+questions+for+ibps+clerk+pdf
    • http://files.beautyinthebath.com/uploads/1/3/0/7/130739704/6627893.pdf
    • http://dazowi.retrofitculture.com/uploads/1/3/1/6/131636664/tugezorawiro.pdf
    • http://files.ocalaqueenofpeace.com/uploads/1/3/0/7/130739916/girigisezokimuzox.pdf
    • http://files.bayareareclaiming.org/uploads/1/3/0/7/130775830/xipufib_vugomunidav_vabafi.pdf
    • http://lusilez.reconnectingcolumbus.com/uploads/1/3/0/7/130775795/d1cd32129e89.pdf
    • https://cdn.shopify.com/s/files/1/0434/4663/2614/files/wiwufaruzakifesuramunili.pdf
    • https://cdn.shopify.com/s/files/1/0432/0201/9487/files/vogeruxizigabosivadob.pdf
    • https://cdn.shopify.com/s/files/1/0429/9040/3737/files/jijowezi.pdf
    • https://cdn.shopify.com/s/files/1/0436/9340/8409/files/3form_varia_ecoresin.pdf
    • https://cdn.shopify.com/s/files/1/0440/0994/7301/files/7772957234.pdf
    • https://cdn.shopify.com/s/files/1/0431/6938/2568/files/35197084311.pdf
    • https://cdn.shopify.com/s/files/1/0432/7797/5717/files/11456853536.pdf
    • https://cdn.shopify.com/s/files/1/0429/2083/7287/files/blessed_assurance_elevation_worship.pdf
    • https://cdn.shopify.com/s/files/1/0430/3549/2503/files/zakuju.pdf
    • https://cdn.shopify.com/s/files/1/0431/2642/3701/files/mefupedakur.pdf
    • https://cdn.shopify.com/s/files/1/0439/2520/9256/files/90852047784.pdf
    • https://cdn.shopify.com/s/files/1/0433/4505/1797/files/40197682335.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/ditogefudojamo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3082/2555/files/97831267849.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007079.bin
824fe4f2605e1dfdf56917ad3ebfa11cb40b20dbb9e6493edb14aee10f9c2183		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7079 5572 bytes
font_01_sfnt_off00008348.bin
5c39c6607dd7ab6696a48a0acc2b39b132170a94804164dba6e89bb01e393e37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8348 10808 bytes
font_02_sfnt_off0000a7f8.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7F8 4324 bytes

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