Malicious PDF — malware analysis report

Static analysis result for SHA-256 18b8f0aa6d75926b…

MALICIOUS

PDF

50.2 KB Created: 2020-08-19 10:47:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9247da69f09f12b9136ce3b6e8858f82 SHA-1: 12a79f02215f4c3417a3e127159aeafb8778140c SHA-256: 18b8f0aa6d75926bceb9329e4d6421e3e35e8c7f0b7b8c2cd7b3d7441b4072a4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to a redirector service identified as malicious. The document body, though heavily obfuscated, contains references to the malicious URL and other URLs hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The primary malicious URL is https://ttraff.com/pify?keyword=dokumen+amdal+pelabuhan+pdf, which is likely used to redirect users to further malicious content.

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=dokumen+amdal+pelabuhan+pdf
    • http://fifazap.a-senseofplace.com/uploads/1/3/0/7/130739777/51aa779a.pdf
    • http://files.rushmerehallprimaryschool.com/uploads/1/3/1/4/131437775/9007516.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/2388/2664/files/27258052203.pdf
    • https://cdn.shopify.com/s/files/1/0430/7809/0901/files/28207014018.pdf
    • https://cdn.shopify.com/s/files/1/0435/5771/6117/files/51005641189.pdf
    • https://cdn.shopify.com/s/files/1/0435/7708/2019/files/xalifagajaged.pdf
    • https://cdn.shopify.com/s/files/1/0430/2100/9053/files/favapek.pdf
    • https://cdn.shopify.com/s/files/1/0439/0112/4760/files/tamufapajosun.pdf
    • https://cdn.shopify.com/s/files/1/0450/3358/6838/files/abortus_insipiens.pdf
    • https://cdn.shopify.com/s/files/1/0447/0145/0396/files/38223167325.pdf
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/popowodibenog.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000724b.bin
c945cfe12a4de5d812c801fa93579538adf50125ccaba796ebcb8a2532018da7
pdf-font-stream PDF embedded font (sfnt) at offset 0x724B 5208 bytes
font_01_sfnt_off000083dd.bin
3f3fdb1da54752769eceabd06e0b594c5b855fa00d050ba5b61df9e6926789f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x83DD 10136 bytes
font_02_sfnt_off0000a669.bin
532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e
pdf-font-stream PDF embedded font (sfnt) at offset 0xA669 16204 bytes