Malicious PDF — malware analysis report

Static analysis result for SHA-256 61136dd502d7ce61…

MALICIOUS

PDF

46.6 KB Created: 2020-07-31 14:18:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5c53c7212bf4ac627b4bcb929b1674a SHA-1: 1df9d8417acd07475fbcbbea4bc369b87bd6a5e3 SHA-256: 61136dd502d7ce61c4b7b0ec5ac14c9f2ec936cbeb565b40deb9566078ad5648
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one heuristic specifically identifying it as a PDF link farm. The primary malicious URL, ttraff.com, is flagged as a redirector to malicious infrastructure. While no scripts were extracted, the presence of numerous links suggests an attempt to lure users to malicious sites, potentially for phishing or malware distribution.

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=a+noite+dos+mortos+vivos+livro+pdf
    • http://files.sunsetairporttransportation.com/uploads/1/3/1/4/131437312/9096797.pdf
    • http://files.metaburger.com/uploads/1/3/1/4/131406736/setezol_ninasijaru_lapifurasopi.pdf
    • http://files.alessandrofanucchi.com/uploads/1/3/1/4/131453733/2174948.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4020/2142/files/41456825886.pdf
    • https://cdn.shopify.com/s/files/1/0432/0293/6992/files/nomolenazigojageragewul.pdf
    • https://cdn.shopify.com/s/files/1/0435/3694/1215/files/90212673552.pdf
    • https://cdn.shopify.com/s/files/1/0430/9218/1153/files/34461709735.pdf
    • https://cdn.shopify.com/s/files/1/0435/2265/4362/files/keriwetovunuvulo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7216/7841/files/jozarusinifif.pdf
    • https://cdn.shopify.com/s/files/1/0433/7680/3990/files/tejaxodijijutirupibeligu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4398/6330/files/35665734539.pdf
    • https://cdn.shopify.com/s/files/1/0427/5548/9948/files/kasaxif.pdf
    • https://cdn.shopify.com/s/files/1/0429/6635/2025/files/57255598749.pdf
    • https://cdn.shopify.com/s/files/1/0433/9394/1671/files/jukavawogugim.pdf
    • https://cdn.shopify.com/s/files/1/0428/9013/3663/files/45361766479.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007310.bin
d6ba7a0c5a75ac02505fb2302c23ea8fd5f5756646087078f22502ba2ed2692e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7310 4816 bytes
font_01_sfnt_off00008355.bin
9fca78bce0291d06df6a230faad95b2362a97ff156a6c8ea6b27dfd84da6003a
pdf-font-stream PDF embedded font (sfnt) at offset 0x8355 13468 bytes