Malicious PDF — malware analysis report

Static analysis result for SHA-256 873a6a833865c9a6…

MALICIOUS

PDF

48.3 KB Created: 2020-08-14 20:28:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f5291ba968dece0abfc2268f09931bb SHA-1: 64dc24a92d3c27be39dc1d333375dd5ab338802b SHA-256: 873a6a833865c9a67e30259e9620cfb6f626ecaa5be53ce794eee6f955f2270c
120 Risk Score

Malware Insights

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

The PDF document contains a link that redirects to a known malicious domain, likely as part of a phishing or scam campaign. The document body, though partially corrupted, contains text related to an 'afmc exam 2019 application form' and a URL pointing to a redirector. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or a method to obscure the final malicious destination. The primary malicious IOC is the redirector URL.

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.com/pify?keyword=afmc+exam+2019+application+form
    • http://files.mayfairreinvestments.com/uploads/1/3/0/9/130969306/d703a98117391.pdf
    • http://files.phuhlisani.org/uploads/1/3/1/4/131453250/6dadc2.pdf
    • http://files.killeenalphas.com/uploads/1/3/0/8/130814209/2149560.pdf
    • https://cdn.shopify.com/s/files/1/0431/2776/7206/files/to_kill_a_mockingbird_aaron_sorkin_script.pdf
    • https://cdn.shopify.com/s/files/1/0428/8462/8633/files/wolewigawopajivobova.pdf
    • https://cdn.shopify.com/s/files/1/0445/3846/2372/files/andragogy_journal.pdf
    • https://cdn.shopify.com/s/files/1/0435/5309/5844/files/29328490925.pdf
    • https://cdn.shopify.com/s/files/1/0428/6332/9446/files/94958387152.pdf
    • https://cdn.shopify.com/s/files/1/0436/4979/4213/files/60716067729.pdf
    • https://cdn.shopify.com/s/files/1/0434/2490/7414/files/princeton_review_gmat_book.pdf
    • https://cdn.shopify.com/s/files/1/0435/7314/9859/files/88212565339.pdf
    • https://cdn.shopify.com/s/files/1/0432/6352/5029/files/pdf_to_eps.pdf
    • https://cdn.shopify.com/s/files/1/0437/6700/5333/files/bangkok_bus_map.pdf
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/lugiwodifadaga.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zobirunutopuwipigodilig.pdf
    • https://cdn.shopify.com/s/files/1/0427/8226/1415/files/fegiwexud.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067ea.bin
89f4dace3016ad15fd50d3add23646efe7da445579b61164e7a108b43f7221f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x67EA 5524 bytes
font_01_sfnt_off00007a9e.bin
e3487dec4caa341293b771f7387c99a4fa5358741cee35b346626358505a9006
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A9E 10832 bytes
font_02_sfnt_off00009ebc.bin
ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8
pdf-font-stream PDF embedded font (sfnt) at offset 0x9EBC 16164 bytes