Malicious PDF — malware analysis report

Static analysis result for SHA-256 109a869872da4faa…

MALICIOUS

PDF

47.4 KB Created: 2020-08-05 23:26:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc7f811e0cdb0b639cfde82c43176fc9 SHA-1: decba2103a9eca4135e89fd0e714833111e7de26 SHA-256: 109a869872da4faab04b3121f2481e50a07a4a25aa7bd5558b983f23e806835f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of embedded URLs, many of which point to external PDF files hosted on various domains. One URL, 'https://ttraff.cc/pify?keyword=formulas+in+excel+2020+with+examples+pdf', is flagged as a malicious redirector. The presence of a large link farm and a malicious redirector suggests an attempt to manipulate search engine results or to lead users to malicious content, potentially for phishing or malware distribution.

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=formulas+in+excel+2020+with+examples+pdf
    • http://files.socta.info/uploads/1/3/1/4/131437295/kosewijowa-nujurunananerod-zunoza-fafuwufe.pdf
    • http://files.capitalsportsmed.com/uploads/1/3/2/7/132711999/7637623.pdf
    • http://files.smporterauthor.co.uk/uploads/1/3/0/7/130775795/wezujewo_jopalejetonig_talesevasi_sunodojapakine.pdf
    • http://files.ggspecialized.com/uploads/1/3/0/7/130739169/12a0e678.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/5793/8581/files/fisotabuwajetekapax.pdf
    • https://cdn.shopify.com/s/files/1/0436/7928/5401/files/madig.pdf
    • https://cdn.shopify.com/s/files/1/0429/4272/6310/files/vukizelos.pdf
    • https://cdn.shopify.com/s/files/1/0434/2022/1607/files/wixoketudaguzo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7833/6165/files/5909347251.pdf
    • https://cdn.shopify.com/s/files/1/0437/9531/6896/files/ahuja_amplifier_circuit_diagram_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/9714/4990/files/92048490993.pdf
    • https://cdn.shopify.com/s/files/1/0431/0944/9884/files/dazorilabefu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2861/9168/files/soradaregunor.pdf
    • https://cdn.shopify.com/s/files/1/0431/5018/0514/files/30639709661.pdf
    • https://cdn.shopify.com/s/files/1/0437/6847/9901/files/54291720908.pdf
    • https://cdn.shopify.com/s/files/1/0430/0052/9049/files/gaxefomufokat.pdf
    • https://cdn.shopify.com/s/files/1/0435/8373/3915/files/sebelefiwelazusuf.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a63.bin
30eb0888ae44e89f272818ff7a2fda76bd7c6f980868f13b4083dcc31496eabd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A63 5664 bytes
font_01_sfnt_off00007d90.bin
a0a2ffd409dc285327a83aca5b4e49d83eb41ac171e4e19788255f582b0ad127		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D90 10784 bytes
font_02_sfnt_off0000a260.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA260 4324 bytes

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