Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e104945ea5222a7…

MALICIOUS

PDF

41.0 KB Created: 2020-08-15 03:56:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 486dd039827b320315ac6f764755e825 SHA-1: fc630d59a73b40ae31232399e3f7cf793cb92445 SHA-256: 6e104945ea5222a7ac35f20cdbefa5002ec29905b356f7b6b62dcc9c17aea566
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://ttraff.com/pify?keyword=apache+spark+mllib+guide'. It also exhibits characteristics of a link farm, with numerous embedded links to other PDFs. The document body, though partially corrupted, contains the same lure text and URLs, suggesting an attempt to disguise malicious links as legitimate 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=apache+spark+mllib+guide
    • http://files.mmflackdesigns.com/uploads/1/3/1/4/131483307/ripatemewofepoke.pdf
    • http://files.marksmancamp.com/uploads/1/3/0/8/130874326/tulemurupefegifo.pdf
    • http://files.corporateactionhero.com/uploads/1/3/2/6/132683334/9309276.pdf
    • http://files.northpinepainting.com/uploads/1/3/1/4/131438002/punixatejozazin_lelimemig.pdf
    • http://files.sacredheartwebbcity.org/uploads/1/3/1/4/131438259/13e27f5024a7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9925/0081/files/63400311804.pdf
    • https://cdn.shopify.com/s/files/1/0436/9163/8934/files/58928917462.pdf
    • https://cdn.shopify.com/s/files/1/0432/5477/5970/files/fazopod.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/42479515564.pdf
    • https://cdn.shopify.com/s/files/1/0438/4836/8288/files/60217188385.pdf
    • https://cdn.shopify.com/s/files/1/0437/4573/8903/files/ilauncher_ios_9.pdf
    • https://cdn.shopify.com/s/files/1/0432/3636/0351/files/deborah_harkness_times_convert.pdf
    • https://cdn.shopify.com/s/files/1/0438/2382/5053/files/66077061168.pdf
    • https://cdn.shopify.com/s/files/1/0437/3708/8154/files/bihar_cabinet_minister_list_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/4623/1449/files/ethiopian_reporter_amharic_news.pdf
    • https://cdn.shopify.com/s/files/1/0433/4449/4750/files/19530312618.pdf
    • https://cdn.shopify.com/s/files/1/0431/6423/7992/files/rekepixarunizexufisezu.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_off0000618a.bin
7b52e1fdccf589854470113c825f33c79e1b0c671539fbcc5a152b2650c4d79b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x618A 5680 bytes
font_01_sfnt_off000074a6.bin
664e90116352e12dd5161efddde56cab66ca2231658a251ff4dfbdfda0cf78e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74A6 10076 bytes

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