Malicious PDF — malware analysis report

Static analysis result for SHA-256 293974deba086e9b…

MALICIOUS

PDF

45.4 KB Created: 2020-08-31 00:24:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1522a00b36dcc126e628a27ec59d6f03 SHA-1: d1df8fc0c4974fc4c928281d5b33accb57cf6351 SHA-256: 293974deba086e9b77362edfb4019f1ffcc72d3fc7094bcc66c90a1cc0a26f10
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'space engineers thruster calculator' and the malicious URL, suggesting a lure to a potentially harmful site. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, many pointing to benign Shopify domains, but the presence of the malicious redirector is a high-confidence indicator of 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/wix?keyword=space+engineers+thruster+calculator
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/flyff_ph_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0133/9304/files/xiwakaxejofon.pdf
    • https://cdn.shopify.com/s/files/1/0435/3966/0954/files/krugman_and_wells_microeconomics_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0457/3164/3558/files/unidad_4_ergonomia.pdf
    • https://static.usrfiles.com/ugd/6260fe_1ff5cd4f29464994a17b4803d5e6b515.pdf
    • https://static.usrfiles.com/ugd/01bc73_5027af15b7c6438788c2a6f97411d491.pdf
    • https://static.usrfiles.com/ugd/2f8cea_2ecd121448134f389740a70b158a581e.pdf
    • https://static.usrfiles.com/ugd/b8c837_b88d3958e0544203acd54e37eeedbea4.pdf
    • https://static.usrfiles.com/ugd/b8c837_d82adfd76b7f42a78f74ed560df4652e.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_13d2d314ab2b4356abe93bce26eed0b9.pdf
    • https://static.usrfiles.com/ugd/b8c837_c3f3980ecb40432683dddd56453d5a04.pdf
    • https://static.usrfiles.com/ugd/10e3af_c0098f490ad3447bbdde3995ec10be9a.pdf
    • https://cdn.shopify.com/s/files/1/0430/9568/7328/files/kopub.pdf
    • https://cdn.shopify.com/s/files/1/0433/7090/5750/files/kaboludolaxopaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/5337/4874/files/emotional_intelligence_self_assessment_questionnaire.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_off00006838.bin
7c90253b14849fab385137bd52902379972f9cedcfbf3951ce5e3ad09892b4c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6838 5300 bytes
font_01_sfnt_off00007a28.bin
542834ac8954f9e091f15f6581b87c178cd9b1df35b175df466f2954ca7a12e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A28 14640 bytes