Malicious PDF — malware analysis report

Static analysis result for SHA-256 81ba54f8c89d3514…

MALICIOUS

PDF

42.3 KB Created: 2020-08-21 20:59:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3692a0dec676ae088bcce73bf26e2b1 SHA-1: bf65902a36c9794e14e7ebd7e9cbaa6fb6fdf264 SHA-256: 81ba54f8c89d35149604cb10444ae5f776a8c427c0b351e9911532269ff7de9d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm with 20 external PDF links, including a critical finding of a link to known malicious redirector infrastructure. The primary malicious URL identified is 'https://ttraff.cc/pify?keyword=m+r+j+d+ka+full+form'. While no scripts were extracted, the PDF structure and embedded links strongly suggest an attempt to redirect users to malicious content, likely for phishing or malware delivery.

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=m+r+j+d+ka+full+form
    • http://fipiwega.heatherbelleink.com/uploads/1/3/0/7/130775734/5248327.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0440/0083/7782/files/jeferetozatadifor.pdf
    • https://cdn.shopify.com/s/files/1/0429/7831/2355/files/veni_creator_raniero_cantalamessa.pdf
    • https://cdn.shopify.com/s/files/1/0429/5173/7498/files/cosplay_commission_contract.pdf
    • https://cdn.shopify.com/s/files/1/0437/9112/2584/files/getedazigevipokorakorof.pdf
    • https://cdn.shopify.com/s/files/1/0437/8073/5138/files/basileus_eu4_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/4394/5628/files/3205125409.pdf
    • https://cdn.shopify.com/s/files/1/0437/7244/4823/files/55502313330.pdf
    • https://cdn.shopify.com/s/files/1/0431/7465/8216/files/gofominikulomebegiviwo.pdf
    • https://cdn.shopify.com/s/files/1/0428/0349/5071/files/to_be_simple_present_tense_exercises.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000046d2.bin
f2fe927d580b4077b2fdf23eef0d38cde1f6e32e959831a215a56c7cf92560f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x46D2 4548 bytes
font_01_sfnt_off00005654.bin
d52746fba60ab6117c25e47af7dec2c2c823e29b3c087ae8444689ffe994260b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5654 10188 bytes
font_02_sfnt_off0000792d.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x792D 4324 bytes
font_03_sfnt_off0000872e.bin
c90edb4b75c6730ef6a95d814fa40b440f0e3c9542449b053c21e820faad648e
pdf-font-stream PDF embedded font (sfnt) at offset 0x872E 5892 bytes