Malicious PDF — malware analysis report

Static analysis result for SHA-256 002b79eb52dcd1a7…

MALICIOUS

PDF

44.1 KB Created: 2020-08-10 11:36:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c4d6f6818e90c8e3d0ceae5481467ea SHA-1: 95777db985c60c69a3ab489b887dd941e6dcedfb SHA-256: 002b79eb52dcd1a77f610e420f20465b17e083e9fee73907279284444bf5e834
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to known malicious redirectors or link farms. The primary malicious URL identified is https://ttraff.com/pify?keyword=grammar+games+and+activities+1+pdf, which is used to redirect users to further malicious content. The ML classifier strongly indicated maliciousness, supporting the heuristic findings.

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=grammar+games+and+activities+1+pdf
    • http://files.coachhousecochins.com/uploads/1/3/0/7/130740065/fadalupilisivex_dirulomukamuvet_vekuwuporumo.pdf
    • http://files.impactremaps.co.uk/uploads/1/3/1/8/131860060/tolipaz-wikijobunosiwi-vuzegedidipifiw.pdf
    • http://files.alexanderswoodfloors.com/uploads/1/3/0/7/130739533/8f6b463ca3f.pdf
    • http://files.vibrantlifechiropractic.com/uploads/1/3/1/8/131857580/rowufeverokesim.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/1905/9868/files/soda_free_trial.pdf
    • https://cdn.shopify.com/s/files/1/0437/8876/3298/files/vocabulary_test_grade_6.pdf
    • https://cdn.shopify.com/s/files/1/0430/6904/6935/files/3600_minutes_to_hours.pdf
    • https://cdn.shopify.com/s/files/1/0438/5390/6080/files/sejesuxiru.pdf
    • https://cdn.shopify.com/s/files/1/0430/1327/5811/files/folizodebagefunopujavi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7347/8560/files/5905539051.pdf
    • https://cdn.shopify.com/s/files/1/0449/8941/5583/files/cancer_tete_du_pancreas.pdf
    • https://cdn.shopify.com/s/files/1/0432/5100/7638/files/lewalusanamebikuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85947343199.pdf
    • https://cdn.shopify.com/s/files/1/0432/8475/8696/files/5583575897.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_off00006dc9.bin
59e0c1ffd985d3baa0a58e24644d4b9744805a771ce6a027e546a2c3d62e2ab9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC9 5584 bytes
font_01_sfnt_off000080c5.bin
fe54f285df889b13ecfe189e39ad1420160813ed3c0c8c30bffe7d18d348402a
pdf-font-stream PDF embedded font (sfnt) at offset 0x80C5 10140 bytes