Malicious PDF — malware analysis report

Static analysis result for SHA-256 61dfd83f2fa1847f…

MALICIOUS

PDF

37.3 KB Created: 2020-09-02 02:12:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7247c657e3280cc7b8216852bb8b3c91 SHA-1: 31d76bcda85b6304083ef5fecce0fd8a2746e7ff SHA-256: 61dfd83f2fa1847f55ff0af47cdbe8ab1fc016d54f98ff941058282d7bb02204
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links, one of which, https://ttraff.com/wix?keyword=blue+panther+books+leseprobe+pdf, is flagged as a malicious redirector. The document also exhibits characteristics of a link farm, with numerous external PDF links, suggesting an attempt to drive traffic to potentially malicious or SEO-abused content. The ML classifier strongly indicates malicious intent.

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/wix?keyword=blue+panther+books+leseprobe+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/e3ff21_5bebeb326fe149ce9e1732275e4ebda4.pdf
    • https://static.usrfiles.com/ugd/c3548c_21da229ff600414f95d240e139ec589d.pdf
    • https://static.usrfiles.com/ugd/c3f88d_b610c17ed96545db97ba82987a09e024.pdf
    • https://static.usrfiles.com/ugd/b8c837_881cf17a5c4749aba71450fa4b908378.pdf
    • https://cdn.shopify.com/s/files/1/0428/5943/0047/files/68263701858.pdf
    • https://cdn.shopify.com/s/files/1/0435/9775/8622/files/atresia_esofagica_tipo_1.pdf
    • https://cdn.shopify.com/s/files/1/0434/1645/3272/files/hamdy_a_taha_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0462/8011/4325/files/downy_lavender_dryer_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0431/0473/1300/files/kopuzonozewufujo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1117/8649/files/heteroside_cardiotonique.pdf
    • https://cdn.shopify.com/s/files/1/0429/9646/5823/files/gegesulivat.pdf
    • https://cdn.shopify.com/s/files/1/0435/1524/8794/files/mitewumisosopofatezorazu.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_off00004b9b.bin
f59fe48cd2a2676d3f83e6b8e7456241ad1312b1f81eee61635a2169875788a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B9B 5384 bytes
font_01_sfnt_off00005dcf.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DCF 1800 bytes
font_02_sfnt_off0000665c.bin
43cd335e83312c3767212701fe71adf9f1d5048fecf0ad1f860780826b72f10e
pdf-font-stream PDF embedded font (sfnt) at offset 0x665C 9836 bytes