Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba338252c2bbe7e1…

MALICIOUS

PDF

65.7 KB Created: 2020-08-20 00:49:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 095135b4af4284151ff620d805006553 SHA-1: 2ed53063f30268a5dc4949671e4eb044ca1710fa SHA-256: ba338252c2bbe7e1d946f88775ff5cea9560f0f38671d5eede2e51ec83ea1fdf
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=game+dev+tycoon+ios+guide+2018'. This indicates the document's primary purpose is to lure users to a potentially harmful site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of numerous embedded URLs, including the malicious redirector, strongly suggests a phishing or malware distribution attempt.

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=game+dev+tycoon+ios+guide+2018
    • http://nazusoxus.psi-loveu.com/uploads/1/3/1/0/131070872/rixixidof-desolarita.pdf
    • http://rasiwok.nicolecheslock.com/uploads/1/3/2/6/132680813/rawogititazo_namukajanirob_xoratopuketujo_kobevab.pdf
    • http://fitozige.mrbdabms.com/uploads/1/3/0/9/130969679/xinumulud.pdf
    • https://cdn.shopify.com/s/files/1/0438/3172/2146/files/22478324523.pdf
    • https://cdn.shopify.com/s/files/1/0433/2634/1272/files/photosynthesis_and_cellular_respiration_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/2465/3224/files/canon_t70_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/8209/6535/files/centrifugal_pump_experiment.pdf
    • https://cdn.shopify.com/s/files/1/0432/8269/4312/files/fojufoserusewabana.pdf
    • https://cdn.shopify.com/s/files/1/0431/9608/8481/files/ihra_rulebook.pdf
    • https://cdn.shopify.com/s/files/1/0427/5005/0460/files/novoluv.pdf
    • https://cdn.shopify.com/s/files/1/0432/2656/2722/files/63720254138.pdf
    • https://cdn.shopify.com/s/files/1/0437/4301/9159/files/bending_moment_formulas.pdf
    • https://cdn.shopify.com/s/files/1/0437/3915/2536/files/15238024588.pdf
    • https://cdn.shopify.com/s/files/1/0432/9180/3801/files/medical_leave_of_absence_letter_format.pdf
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/73805355254.pdf
    • https://cdn.shopify.com/s/files/1/0434/6124/7138/files/nebanis.pdf
    • https://cdn.shopify.com/s/files/1/0429/0599/3375/files/fimigop.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000becc.bin
d2a010304c957ec15b6c412e0b91d30eb34c45b6864e45c4f3e682480b11dfeb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBECC 5844 bytes
font_01_sfnt_off0000d2be.bin
ffc03cbfa2bf1f21908b82110d96e3c34ca669a00a89c103fe944e6695907cf2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2BE 12008 bytes

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