Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d637f12b02c4577…

MALICIOUS

PDF

44.3 KB Created: 2020-08-06 10:37:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9020cecb32deb149c294be50718f551 SHA-1: 112f2499f095f3166aaf260ce8edf853a1948e74 SHA-256: 0d637f12b02c4577c6d5b53f548a6c42429b7bb660c9694fb8bc74ba296bdbca
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to harmful content. The document also features a large number of external PDF links, characteristic of a link farm, likely for SEO manipulation or to obscure malicious destinations. While no scripts were extracted, the presence of malicious links and the ML classifier's high confidence suggest a deliberate 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.ru/pify?keyword=auto+diagnosis+service+and+repair+pdf
    • http://files.aplmuseumpasses.com/uploads/1/3/1/4/131406412/7724621.pdf
    • http://files.catholicsinaldeburghandleiston.org/uploads/1/3/1/4/131406435/1528207.pdf
    • http://files.charlesharveyauthor.com/uploads/1/3/1/4/131407767/b13c09.pdf
    • http://files.plainbird.org/uploads/1/3/0/8/130813834/2fb9bb2.pdf
    • http://files.ubersupplies.net/uploads/1/3/1/4/131410606/2734414.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7767/2868/files/kesamufu.pdf
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/xovix.pdf
    • https://cdn.shopify.com/s/files/1/0432/5729/9097/files/mupizararefewur.pdf
    • https://cdn.shopify.com/s/files/1/0447/5063/5162/files/dennis_rainey_preparing_for_marriage.pdf
    • https://cdn.shopify.com/s/files/1/0436/4192/9886/files/sailing_out_jhene_aiko.pdf
    • https://cdn.shopify.com/s/files/1/0431/7138/1405/files/delufoboxanejefot.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/75278808376.pdf
    • https://cdn.shopify.com/s/files/1/0433/6254/9910/files/4623761698.pdf
    • https://cdn.shopify.com/s/files/1/0448/0276/9053/files/pro_tools_free_download_full_version_cracked.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31968244380.pdf
    • https://cdn.shopify.com/s/files/1/0433/0346/9221/files/zaraxidazonofen.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_off00006e11.bin
7c09ec629b2bafc791b804b16631b002920759d15e3f2daf7eff8971b5c91d8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E11 5340 bytes
font_01_sfnt_off00008059.bin
d32d46c8169efb30c6cf7dbc231cc0d4423be1ce9c0a8a24ba5c15ccaf2b9873		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8059 10516 bytes

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