Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cc9e8da4fcf89b3…

MALICIOUS

PDF

80.9 KB Created: 2020-08-22 23:44:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7e4e22760ce12791816b042537beff3 SHA-1: eb5c6b3ce4ef1acb097c333578f2115b7d09456d SHA-256: 1cc9e8da4fcf89b3bc8895bb0e46aa21740d75dd854c601a2d40104649701f1d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be the primary redirect target. The presence of a large number of external PDF links suggests a link farm designed to obscure the true malicious destination.

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.ru/pify?keyword=reported+speech+speaking+activity+pdf
    • http://liral.mccrackenceramics.com/uploads/1/3/2/7/132740214/zewejeva-sidisupirafer-tutusujufexizu.pdf
    • http://files.tucsontattooexpo.com/uploads/1/3/0/9/130969061/poxegimixepufu.pdf
    • http://dilipofu.holidayhousesrarotonga.com/uploads/1/3/1/4/131482975/59da7003d.pdf
    • http://files.rwandalawoffice.com/uploads/1/3/0/8/130813755/8600392.pdf
    • http://jegex.logcabinrental.ca/uploads/1/3/1/4/131454165/f791a2366c0b8.pdf
    • https://cdn.shopify.com/s/files/1/0432/6483/5737/files/independent_events_worksheet_1_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0430/6803/1143/files/1048075846.pdf
    • https://cdn.shopify.com/s/files/1/0433/7329/7822/files/kopesalopaxisob.pdf
    • https://cdn.shopify.com/s/files/1/0431/6640/0673/files/tewagapexugasinojolobare.pdf
    • https://cdn.shopify.com/s/files/1/0431/5050/8181/files/past_tense_worksheets_grade_4.pdf
    • https://cdn.shopify.com/s/files/1/0459/6341/1616/files/hill_house_care_home_cqc_report.pdf
    • https://cdn.shopify.com/s/files/1/0434/3375/4773/files/34317105066.pdf
    • https://cdn.shopify.com/s/files/1/0432/1479/9012/files/ramujikeragovu.pdf
    • https://cdn.shopify.com/s/files/1/0435/7442/7806/files/foxeburemikinemuluxipew.pdf
    • https://cdn.shopify.com/s/files/1/0435/3435/2548/files/vabexudovudinofuwawozepu.pdf
    • https://cdn.shopify.com/s/files/1/0437/2194/9335/files/cessna_172p_poh.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/

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e913.bin
dd7b880f1c6958317b71933e3175eb4154b1281d355b69180e4ce829e506ee21		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE913 2828 bytes
font_01_sfnt_off0000f30d.bin
2eccbc567fa13cb76d927350c2849c2707d0a8c06e87d14c639045c6f5750e21		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF30D 5408 bytes
font_02_sfnt_off0001057d.bin
5c54eb010241cac3d703717cdcdadc7ed3e36cdab11f69a25cf2a04d3830bef8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1057D 9964 bytes
font_03_sfnt_off0001278e.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1278E 4324 bytes

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