Malicious PDF — malware analysis report

Static analysis result for SHA-256 72649b323222489a…

MALICIOUS

PDF

43.3 KB Created: 2020-08-07 06:28:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3480f48e90929ba4b17ed347461795ec SHA-1: 3543215c3bfe859dd145c10ef2327770ac0b58ae SHA-256: 72649b323222489a532e0f732ecca41fd2417ab43283e110a225cda13b0db1b3
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector service, which is a common tactic for distributing malware or leading users to phishing sites. The document body, though heavily obfuscated, contains text related to performance appraisals and includes the malicious URL. The ML classifier strongly indicated maliciousness, and the presence of numerous external links suggests a link farm designed to attract traffic.

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=conducting+a+performance+appraisal+interview+pdf
    • http://files.ernestng.com.au/uploads/1/3/0/9/130969440/jawilagura.pdf
    • http://files.moverightmethod.com/uploads/1/3/1/3/131380689/890751c4881fcb.pdf
    • http://jalunopa.wolfcrybeardcompany.com/uploads/1/3/0/7/130740051/162f415bb43.pdf
    • http://detul.thekookas.com/uploads/1/3/0/7/130738696/mobix.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/gazonokofibuva.pdf
    • https://cdn.shopify.com/s/files/1/0432/8026/9477/files/37773648469.pdf
    • https://cdn.shopify.com/s/files/1/0434/6278/7237/files/52917956590.pdf
    • https://cdn.shopify.com/s/files/1/0432/5549/6866/files/jozazabopu.pdf
    • https://cdn.shopify.com/s/files/1/0435/1036/6362/files/68841037328.pdf
    • https://cdn.shopify.com/s/files/1/0434/3024/8600/files/sojibamirejojija.pdf
    • https://cdn.shopify.com/s/files/1/0432/4232/4125/files/favalexinepuk.pdf
    • https://cdn.shopify.com/s/files/1/0430/2071/4137/files/black_ops_2_apocalypse_map_pack_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/0144/6554/files/97421168045.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tugogesobiwem.pdf
    • https://cdn.shopify.com/s/files/1/0437/4354/3447/files/pdf_burdah_dan_artinya.pdf
    • https://cdn.shopify.com/s/files/1/0430/9948/8410/files/ley_de_bienes_nacionales_honduras.pdf
    • https://cdn.shopify.com/s/files/1/0431/7180/7396/files/warovonu.pdf
    • https://cdn.shopify.com/s/files/1/0435/1036/6362/files/vokogux.pdf
    • https://cdn.shopify.com/s/files/1/0428/7247/1718/files/panopina.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_off00006a2a.bin
6cabcee46f550126ec87f5841353f2e4fc350747f9acb6969bffd53b82fb6fd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A2A 5532 bytes
font_01_sfnt_off00007cfa.bin
7ac7d0500fbfce7f768471312c048a4bf830d79a4b7c5830071385aebc583f38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CFA 10124 bytes

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