Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e7f0e0a71a05581…

MALICIOUS

PDF

41.2 KB Created: 2020-08-20 00:05:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5ace9a4e777947121f0621de997c72b SHA-1: 5456f327102cff96c053c8d0c547130b80721b5c SHA-256: 8e7f0e0a71a0558185913a26394f53363687e34c2bcbb4393870ad3c24d4dd7d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the same lure text as the malicious URL, indicating a phishing attempt. The ML classifier strongly supports the malicious verdict.

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=great+migrations+reading+answers+with+location
    • http://files.leilahmoondances.com/uploads/1/3/0/7/130740420/foxikem_ligabe.pdf
    • http://files.ryashini.com/uploads/1/3/1/4/131410870/2322076.pdf
    • http://tuwufu.calistosecretkennel.com/uploads/1/3/1/6/131607310/9504445.pdf
    • http://files.evelinemariasmith.com/uploads/1/3/1/8/131856079/5170150.pdf
    • http://sadum.tacomaquakers.com/uploads/1/3/2/7/132712207/janitekabogu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2620/3302/files/mowun.pdf
    • https://cdn.shopify.com/s/files/1/0429/8558/6849/files/14108954254.pdf
    • https://cdn.shopify.com/s/files/1/0435/7708/2019/files/entrepreneurship_in_philippine_setting_for_senior_high_school.pdf
    • https://cdn.shopify.com/s/files/1/0431/3006/0955/files/vipikejorifonasekasekiwuz.pdf
    • https://cdn.shopify.com/s/files/1/0436/4363/3822/files/fafakijosevigubakonix.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5807/files/83076148660.pdf
    • https://cdn.shopify.com/s/files/1/0433/0238/7867/files/baxilavulixezumazede.pdf
    • https://cdn.shopify.com/s/files/1/0433/5557/0341/files/98983782862.pdf
    • https://cdn.shopify.com/s/files/1/0437/2309/6216/files/dewukoref.pdf
    • https://cdn.shopify.com/s/files/1/0434/7445/2632/files/linofegamigusijavini.pdf
    • https://cdn.shopify.com/s/files/1/0438/0341/0593/files/somugobi.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062c9.bin
4d3f3de7bb55ca396f9f89aa0dd4e7c2cb197b6735c5d8e6c1386c0f7ac8c677
pdf-font-stream PDF embedded font (sfnt) at offset 0x62C9 5476 bytes
font_01_sfnt_off0000754b.bin
ab9db98f0970eb9b96ed69dbce57d422402387385e87fa03bb294d135ae6c02c
pdf-font-stream PDF embedded font (sfnt) at offset 0x754B 9936 bytes