Malicious PDF — malware analysis report

Static analysis result for SHA-256 083e8ec12149c492…

MALICIOUS

PDF

45.0 KB Created: 2020-08-03 13:37:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59e0ba731c8108a5e1605041498d2b79 SHA-1: 4d3cb0e72d44b042fcc6d4115bde23d92515db96 SHA-256: 083e8ec12149c49201294468effd4e62c30ed47f746d2471a2874a3137649f01
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one prominent URL pointing to a known malicious redirector. The document body, though partially corrupted, includes text suggesting it is a PDF related to "Introductory geographic information systems jensen pdf", likely a lure. The presence of multiple external links, including those to Shopify, suggests a link farm or SEO poisoning tactic to distribute 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.ru/pify?keyword=introductory+geographic+information+systems+jensen+pdf
    • http://files.nevingtonwarmuseum.com/uploads/1/3/0/7/130739883/gupudukibejid.pdf
    • http://files.firstclasssuccess.com/uploads/1/3/2/7/132740670/4838016.pdf
    • http://files.humanitycenter4change.org/uploads/1/3/2/7/132740978/midugulebafe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27482348981.pdf
    • https://cdn.shopify.com/s/files/1/0432/4930/3720/files/saxaxawesapugezakif.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/bloody_mary_morning_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rodol.pdf
    • https://cdn.shopify.com/s/files/1/0431/4021/9041/files/fios_tv_guide_arlington_va.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rejukimuvili.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0938/files/38304257950.pdf
    • https://cdn.shopify.com/s/files/1/0431/1869/0458/files/vosisuviw.pdf
    • https://cdn.shopify.com/s/files/1/0441/3915/1512/files/89720088941.pdf
    • https://cdn.shopify.com/s/files/1/0438/7271/4920/files/berserk_2016_episode_1.pdf
    • https://cdn.shopify.com/s/files/1/0432/4242/2440/files/63425171836.pdf
    • https://cdn.shopify.com/s/files/1/0430/8906/8185/files/34406187827.pdf
    • https://cdn.shopify.com/s/files/1/0429/4865/7311/files/22978329064.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_off00006e60.bin
2ba2030b6acdf1b4f3395da6bc9f40313f51c1eee0961e7ae457fcc8acce9cfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E60 5652 bytes
font_01_sfnt_off00008181.bin
1d711a6d6642e9b4389d1a418a590c8f0cce2247e06e9499daa7f94d9988e1bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8181 10220 bytes

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