Malicious PDF — malware analysis report

Static analysis result for SHA-256 80cf4b75b70707fc…

MALICIOUS

PDF

45.2 KB Created: 2020-08-14 03:42:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b763fac246313ccc4202caa3d54d283b SHA-1: d548c36decd5628532b67d2f85d81fb1dfa4fa31 SHA-256: 80cf4b75b70707fc68350160c5050fdbfaa0f260da47cc2d188294d80ba08381
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with a critical heuristic firing indicating it redirects to known malicious infrastructure. The primary URL identified, 'https://ttraff.com/pify?keyword=google+analytics+android+app', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to malicious 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=google+analytics+android+app
    • http://files.winterra.ca/uploads/1/3/1/0/131070894/vitesi-kuwus-fikudeworodub-fopujazunap.pdf
    • http://fulazisib.sola13.jungw8.com/uploads/1/3/0/7/130776688/gupefixupomu-foposof.pdf
    • http://foraxugaw.supportacrafter.co.za/uploads/1/3/0/9/130969335/lexowowewibu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0440/0683/4334/files/veletuzanuvikixa.pdf
    • https://cdn.shopify.com/s/files/1/0429/8106/4853/files/buddhismus_kniha.pdf
    • https://cdn.shopify.com/s/files/1/0433/3276/3801/files/gta_3_apk.pdf
    • https://cdn.shopify.com/s/files/1/0437/0703/9895/files/environmental_risk_assessment_report.pdf
    • https://cdn.shopify.com/s/files/1/0430/1740/4573/files/tojamuwefaxujizagubotu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8669/3023/files/42242842907.pdf
    • https://cdn.shopify.com/s/files/1/0430/5335/1066/files/suvadelusaki.pdf
    • https://cdn.shopify.com/s/files/1/0429/4197/2636/files/dujerubonirefuvimifo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3350/9534/files/suvegolagizari.pdf
    • https://cdn.shopify.com/s/files/1/0433/4364/2773/files/r._t._o_exam_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/7317/4680/files/70519521728.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_off0000650e.bin
d50b070c37bc2925339c2c27d9fc65620f92c5c6c211446b47cd7c20c72b2ff6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x650E 5160 bytes
font_01_sfnt_off000076b2.bin
130c6a8e63a0b2d8de2bbdcbaf25cc7c60087fc1a23818708755c2a20c2401bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76B2 10244 bytes
font_02_sfnt_off000099c3.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99C3 4324 bytes

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