Malicious PDF — malware analysis report

Static analysis result for SHA-256 72e90542940a6451…

MALICIOUS

PDF

56.9 KB Created: 2020-08-10 08:40:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31146641229f62583bd426a6d5d2666c SHA-1: 74cd4ea72078535c779540e9b0efea8ad44c06ae SHA-256: 72e90542940a64514d672223e19620cc389d4b3a169fe431fc744f249025fd38
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with a critical heuristic firing indicating it points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the one flagged by the redirector heuristic. This suggests the document is designed to lead users to malicious sites, likely 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=biodiesel+production+from+vegetable+oil+pdf
    • http://wikifutuv.lifeisforlivingshow.co.uk/uploads/1/3/1/4/131438177/jumorepijekodoni.pdf
    • http://files.mehanphoto.com/uploads/1/3/0/7/130739525/e4d9122d.pdf
    • http://files.spinteesprints.com/uploads/1/3/1/4/131453610/dofavopuwiri.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/2047/6828/files/mexutexopivotodobilevuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/8694/6206/files/materiales_metalicos_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0429/2493/3283/files/41635154813.pdf
    • https://cdn.shopify.com/s/files/1/0433/1008/8357/files/gusifobakure.pdf
    • https://cdn.shopify.com/s/files/1/0431/2491/6388/files/masobaneliwipozin.pdf
    • https://cdn.shopify.com/s/files/1/0434/2625/0917/files/48888600647.pdf
    • https://cdn.shopify.com/s/files/1/0430/0052/9049/files/8253422237.pdf
    • https://cdn.shopify.com/s/files/1/0431/0279/7986/files/stardew_valley_golden_clock.pdf
    • https://cdn.shopify.com/s/files/1/0432/9465/4632/files/baborezudubisonisikowulo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8390/6724/files/52380776891.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4033/files/lusisamubanagakesifodafos.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/femepotufitaxaturu.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_off00009fcc.bin
68b1f39ada733487263a1c7b6fd8b75045032b8259384d033431791bfe8dee8f
pdf-font-stream PDF embedded font (sfnt) at offset 0x9FCC 5724 bytes
font_01_sfnt_off0000b33b.bin
29101b47b3e7b233f98c20f86338fceb13a46ca2c1f118dd8d9210e4dff0ece8
pdf-font-stream PDF embedded font (sfnt) at offset 0xB33B 10208 bytes