Malicious PDF — malware analysis report

Static analysis result for SHA-256 163b5618ca5b5482…

MALICIOUS

PDF

40.3 KB Created: 2020-08-20 09:25:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 967d3abdc408379c8247251be6fc8945 SHA-1: 9ea1a93316729cd0e62be8860d2593a685ec956c SHA-256: 163b5618ca5b54824350347c7f6d7c07f993dba3e0d8f8b7fad99db32308060c
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one heuristic specifically identifying a link to known malicious redirector infrastructure. The document body, though partially corrupted, contains text related to goal setting and a URL that appears to be a redirector. The presence of numerous links suggests an attempt to direct users to external, potentially malicious, sites.

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=simple+goal+setting+worksheet+pdf
    • http://guxes.connorshillgospelhall.com/uploads/1/3/0/7/130739124/5896641.pdf
    • http://files.intothesails.com/uploads/1/3/2/6/132681343/suvijaw.pdf
    • http://files.bikerstoreuk.com/uploads/1/3/1/3/131379014/1100317.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/3713/0914/files/94647050503.pdf
    • https://cdn.shopify.com/s/files/1/0433/8932/1366/files/94192634104.pdf
    • https://cdn.shopify.com/s/files/1/0438/7841/6539/files/thumb_drift_cheats.pdf
    • https://cdn.shopify.com/s/files/1/0437/6369/5770/files/10479631780.pdf
    • https://cdn.shopify.com/s/files/1/0435/2881/4741/files/myers_briggs_online_personality_test.pdf
    • https://cdn.shopify.com/s/files/1/0433/2666/8952/files/gukupajuwadegimovo.pdf
    • https://cdn.shopify.com/s/files/1/0444/3983/0695/files/gears_of_war_4_multiplayer_tips.pdf
    • https://cdn.shopify.com/s/files/1/0428/0313/4627/files/9895274684.pdf
    • https://cdn.shopify.com/s/files/1/0433/9102/5303/files/dosozewexumuxeniz.pdf
    • https://cdn.shopify.com/s/files/1/0436/0496/7581/files/91152830327.pdf
    • https://cdn.shopify.com/s/files/1/0435/7236/3432/files/buccinator_mechanism.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lapifobojupe.pdf
    • https://cdn.shopify.com/s/files/1/0439/3716/9576/files/legazasazolejokijag.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_off00005ec0.bin
eaf547ea471fba8cc5bb79bcf1ef87d9f7657e0c5b87dbea126daecec85a3fa1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC0 5716 bytes
font_01_sfnt_off0000720c.bin
651ffa8cb33d25bbef3d744858693da48fb9710d187fb28b4346a9daaa0aaf20
pdf-font-stream PDF embedded font (sfnt) at offset 0x720C 10036 bytes