Malicious PDF — malware analysis report

Static analysis result for SHA-256 4af7433f500887c4…

MALICIOUS

PDF

42.4 KB Created: 2020-08-10 02:07:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a54985632672a954129387051e74099e SHA-1: 192f8add951361ab0674d0326a92bf6fa6841b7c SHA-256: 4af7433f500887c42f445c9e9a1da0e261b263767ced892310beca58af04ed09
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as a utility for converting PDF to JPG on iPhones. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the malicious nature of the primary URL. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many hosted on cdn.shopify.com, suggesting an attempt to manipulate search results or distribute further malicious content. No scripts were extracted, but the presence of a malicious redirector is sufficient to classify the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/pify?keyword=change+pdf+to+jpg+iphone
    • http://files.reelmemoriesvideo.com/uploads/1/3/0/7/130775510/2599952.pdf
    • http://files.greaterpushaw.org/uploads/1/3/0/7/130775853/pifabugetitalusumuno.pdf
    • http://biped.advancedequinesaddlefit.com/uploads/1/3/1/6/131637016/3152368.pdf
    • https://cdn.shopify.com/s/files/1/0434/5466/0758/files/34061252513.pdf
    • https://cdn.shopify.com/s/files/1/0428/2328/6940/files/busofekibumavo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3385/4103/files/21280383683.pdf
    • https://cdn.shopify.com/s/files/1/0434/5102/3510/files/zazewudi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8477/5577/files/sumakomolarulotanagolin.pdf
    • https://cdn.shopify.com/s/files/1/0438/9791/3512/files/rikadurevatoxusade.pdf
    • https://cdn.shopify.com/s/files/1/0428/6126/5062/files/71087173541.pdf
    • https://cdn.shopify.com/s/files/1/0430/9162/4096/files/5e_attacking_from_stealth.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zixetirubopejama.pdf
    • https://cdn.shopify.com/s/files/1/0432/3672/0808/files/bukudumifuwogogaxekupigu.pdf
    • https://cdn.shopify.com/s/files/1/0437/3495/8229/files/asmaul_husna_99_dan_artinya.pdf
    • https://cdn.shopify.com/s/files/1/0431/0145/4496/files/simple_budget_proposal_sample.pdf
    • https://cdn.shopify.com/s/files/1/0432/0319/9136/files/zijeteze.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_off00006943.bin
2a1716b6221ae9d684c90f5d12a576fb2d86554560ca13233490505f0216aa22
pdf-font-stream PDF embedded font (sfnt) at offset 0x6943 4980 bytes
font_01_sfnt_off00007a3c.bin
eea01bb6f1cffb200716bb7df6e62cdfed3e50ef5b9112039cc3955faa831e23
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A3C 10060 bytes