Malicious PDF — malware analysis report

Static analysis result for SHA-256 80bae7ed309cfe52…

MALICIOUS

PDF

45.9 KB Created: 2020-08-13 15:43:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51429a40876928068f71605d8c83eb79 SHA-1: 365ee8ddee41a1f302c3bc96cc990994e9fec366 SHA-256: 80bae7ed309cfe5232ed82af1228b70a11810585d9e667dd19eaca1e3a9af261
162 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=ibat+ibang+uri+ng+akademikong+pagsulat+pdf'. This URL is likely part of a link farm designed to distribute malicious content. The presence of XFA forms and a high ML classifier score further indicate malicious intent. The document body, though heavily obfuscated, contains the malicious URL and references to other PDFs, suggesting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • 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=ibat+ibang+uri+ng+akademikong+pagsulat+pdf
    • http://sizuk.inoneworship.org/uploads/1/3/1/4/131437987/suwebuk.pdf
    • http://fujadozu.vanessamariedewsbury.com/uploads/1/3/0/8/130874493/4463587.pdf
    • http://goxojo.socmedglobal.org/uploads/1/3/0/7/130775432/petili.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8862/5316/files/wevof.pdf
    • https://cdn.shopify.com/s/files/1/0433/6871/0294/files/python_two_decimal_places.pdf
    • https://cdn.shopify.com/s/files/1/0433/3967/7855/files/spektrum_dx6_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/9423/5553/files/alice_in_wonderland_original_text.pdf
    • https://cdn.shopify.com/s/files/1/0434/8149/7766/files/devabibojojasatunininu.pdf
    • https://cdn.shopify.com/s/files/1/0437/5930/4865/files/survival_hunter_icy_veins.pdf
    • https://cdn.shopify.com/s/files/1/0441/1519/8104/files/ankle_sprain_rehab_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0439/0407/3883/files/15427250815.pdf
    • https://cdn.shopify.com/s/files/1/0434/9798/0056/files/liwanovukaped.pdf
    • https://cdn.shopify.com/s/files/1/0437/8918/9272/files/visijemigofanemojo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7600/1704/files/tila_tequila_fuck.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_off000073cb.bin
2a7d8e10655712e00398872cee58fdf5e29fdc438f835f99fc2c3ed7994b307f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73CB 5500 bytes
font_01_sfnt_off00008669.bin
c3d84b0b88c9c52ac64799f634b5a7a4f80f1a4b10e2e2f49bc62e6fac4134b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8669 10516 bytes

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