Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bc135e2eba9a471…

MALICIOUS

PDF

34.6 KB Created: 2020-08-14 07:07:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e482a5623a37cbd7d0d284ca1caf0e8c SHA-1: 7d36263e86f6fa16720e377a2ac7b627a35d84c3 SHA-256: 6bc135e2eba9a471aa55b74e7117dcdb78f8a2c300a48ef957f69de846a45601
154 Risk Score

Malware Insights

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

The PDF document contains a heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=xbl+barcode+generator+for+excel', suggesting a lure to disguise malicious activity. The presence of numerous other PDF links indicates a link farm designed to obscure the true malicious intent and potentially distribute further malware or phishing 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.com/pify?keyword=xbl+barcode+generator+for+excel
    • http://files.letmebreakthisdownforyall.com/uploads/1/3/0/7/130776826/wobafinijizama.pdf
    • http://sabajo.nicoleadrienneart.com/uploads/1/3/1/4/131453284/4157044.pdf
    • http://files.labordebeefalofarms.com/uploads/1/3/1/4/131411281/fojegoki.pdf
    • http://files.theyogaterminal.co.uk/uploads/1/3/1/3/131379776/zulowixawomali.pdf
    • http://texip.bluckmagic.com/uploads/1/3/0/7/130738732/cc2d3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/8640/4000/files/ap_anganwadi_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0429/1795/3702/files/achievement_test_sample.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/42292084400.pdf
    • https://cdn.shopify.com/s/files/1/0439/9199/0430/files/tejifuvuwob.pdf
    • https://cdn.shopify.com/s/files/1/0437/9725/0210/files/tupat.pdf
    • https://cdn.shopify.com/s/files/1/0429/6979/2668/files/90087013229.pdf
    • https://cdn.shopify.com/s/files/1/0447/6724/8535/files/vibrate_when_call_is_answered_note_9.pdf
    • https://cdn.shopify.com/s/files/1/0429/9273/0275/files/bamazabijigelatidigitoga.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/35022180152.pdf
    • https://cdn.shopify.com/s/files/1/0431/5830/6965/files/82567130904.pdf
    • https://cdn.shopify.com/s/files/1/0437/9105/7058/files/loic_wacquant_las_carceles_de_la_miseria.pdf
    • https://cdn.shopify.com/s/files/1/0438/4423/9517/files/nezadoseteridomore.pdf
    • https://cdn.shopify.com/s/files/1/0432/7243/7913/files/jaziwop.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_off000049bc.bin
6c1b4f0e29b1c14ac65b382338c4f7972dfa6143d1489fdcbffebce8a8753aa7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49BC 5196 bytes
font_01_sfnt_off00005b6f.bin
a9cf2338463898b53f8ffdde4a84fdb542ad1a9277915a833f19f837715503cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B6F 10408 bytes

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