Malicious PDF — malware analysis report

Static analysis result for SHA-256 71974f55108be41c…

MALICIOUS

PDF

45.0 KB Created: 2020-08-05 03:05:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21064fb818ddaf2d9ad31a775dc5e147 SHA-1: c45720f34d51b00081674346745e695712929cd9 SHA-256: 71974f55108be41c1bb1d520980b521a9d1cc67dfc18da6895d8741a4ebd37e9
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. A primary link directs to a known malicious redirector at 'ttraff.com', indicating a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious.

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=apollinaire+alcools+pdf+english
    • http://files.oteromuseum.org/uploads/1/3/0/7/130775361/01c8a736a9846.pdf
    • http://files.endeavourrowers.org/uploads/1/3/2/7/132740900/vafiwamur.pdf
    • http://files.doverfirst.org/uploads/1/3/1/4/131411539/morol-tuzujuvo-lekunu-bolapakezal.pdf
    • http://files.greatratesbroker.com/uploads/1/3/1/4/131438046/3413124.pdf
    • http://files.saxophonelessonscolumbus.com/uploads/1/3/1/1/131163851/zakumagutibuxek.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/5642/1278/files/vudalaritefirujigexuge.pdf
    • https://cdn.shopify.com/s/files/1/0430/6350/9146/files/rulejus.pdf
    • https://cdn.shopify.com/s/files/1/0437/7313/2954/files/zemuziweguvu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/26285660565.pdf
    • https://cdn.shopify.com/s/files/1/0430/6134/6466/files/52000000920.pdf
    • https://cdn.shopify.com/s/files/1/0427/9857/9879/files/nezul.pdf
    • https://cdn.shopify.com/s/files/1/0435/0961/2712/files/vcom_sis_portal.pdf
    • https://cdn.shopify.com/s/files/1/0431/6659/7288/files/niripisudavuvajoxa.pdf
    • https://cdn.shopify.com/s/files/1/0450/9509/2376/files/formwork_for_concrete_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0439/8972/9438/files/imagine_reading_a_post.pdf
    • https://cdn.shopify.com/s/files/1/0431/8514/3965/files/11416836606.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_off00006497.bin
182c29191f3f850c8f020b85090da9e42e1870912ce028f365190e50a95c7ecd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6497 5112 bytes
font_01_sfnt_off000075e4.bin
2d3eadbffb6330a22548eb1d0230b036a96c8f54940eaaa56e2a086e03051466		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75E4 10240 bytes
font_02_sfnt_off000098fd.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98FD 4324 bytes

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