Malicious PDF — malware analysis report

Static analysis result for SHA-256 a80c58470ea946a0…

MALICIOUS

PDF

45.0 KB Created: 2020-08-19 11:21:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5d18ae6447c465beb0e5b3b049ecb61 SHA-1: 2683491d747de5ed4b774a08617c5930ee2448e2 SHA-256: a80c58470ea946a0d4abde11facaac7f5187c99e28aea08886bf41c2490788b8
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector infrastructure. This redirector is likely used to obscure the final malicious destination. The presence of a "food diary excel template" lure suggests a social engineering tactic to entice clicks. No scripts were extracted, but the PDF structure and embedded URLs strongly indicate a malicious redirection attempt.

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.cc/pify?keyword=food+diary+excel+template
    • http://farad.leggingsusaonline.com/uploads/1/3/1/6/131636903/feneluna.pdf
    • https://cdn.shopify.com/s/files/1/0431/3874/4469/files/goroxozo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7896/5656/files/15153972871.pdf
    • https://cdn.shopify.com/s/files/1/0430/7537/1159/files/budgeting_and_profit_planning.pdf
    • https://cdn.shopify.com/s/files/1/0435/0309/1876/files/identifying_cause_and_effect_worksheets_for_grade_2.pdf
    • https://cdn.shopify.com/s/files/1/0430/3041/3475/files/basic_academic_writing_skills.pdf
    • https://cdn.shopify.com/s/files/1/0431/4864/0418/files/vikofuzekodovogefuwewiri.pdf
    • https://cdn.shopify.com/s/files/1/0436/7283/0105/files/learner_centred_teaching_approaches.pdf
    • https://cdn.shopify.com/s/files/1/0454/6340/4694/files/banana_island_game.pdf
    • https://cdn.shopify.com/s/files/1/0436/2846/2240/files/98643817820.pdf
    • https://cdn.shopify.com/s/files/1/0431/5987/9841/files/78935367546.pdf
    • https://cdn.shopify.com/s/files/1/0433/1087/4777/files/letter_s_applique_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tavolotifejenirogamofiv.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_off0000738c.bin
83709c7d2afaa4c5fbeb6d8d2f43181ab655a2c18471d72fcf419dbc2761443b
pdf-font-stream PDF embedded font (sfnt) at offset 0x738C 5164 bytes
font_01_sfnt_off00008520.bin
9dffd37b61ed70ce75619b4ce85e503d087df01795dcb5eedcd5d4d4aa7b7452
pdf-font-stream PDF embedded font (sfnt) at offset 0x8520 10080 bytes