Malicious PDF — malware analysis report

Static analysis result for SHA-256 6abc274410d34f90…

MALICIOUS

PDF

43.6 KB Created: 2020-08-02 05:09:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0154cb26b9084fd6b2a4ab7c32e95de7 SHA-1: 9a4b9ced22fadd9676ab7b46873566a0f386d97c SHA-256: 6abc274410d34f9018458fb4d15775df0ef356b551a636e7031e0b07387d477a
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector (ttraff.cc), indicating a phishing or malware distribution attempt. The document body, though corrupted, contains text suggesting it is a catalog, likely a lure. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector and link farm.

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=skf+ball+bearings+catalog+pdf
    • http://files.sweetnspicecandles.ca/uploads/1/3/2/7/132710676/9273107.pdf
    • http://files.enakosovac.com/uploads/1/3/0/7/130739275/61442ae02cac69.pdf
    • http://files.lavangfoods.com/uploads/1/3/0/7/130775734/ec7574d477b4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/7939/1646/files/26484047739.pdf
    • https://cdn.shopify.com/s/files/1/0430/6049/4485/files/96979397565.pdf
    • https://cdn.shopify.com/s/files/1/0433/8984/5671/files/president_forever_2008_primaries.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6925/files/47585999410.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94662163826.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3560/files/85961254160.pdf
    • https://cdn.shopify.com/s/files/1/0431/9235/2932/files/10772355848.pdf
    • https://cdn.shopify.com/s/files/1/0430/1104/7575/files/xagazogiwar.pdf
    • https://cdn.shopify.com/s/files/1/0431/0935/1578/files/47508747905.pdf
    • https://cdn.shopify.com/s/files/1/0432/4599/4146/files/wetajigewugixob.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060ab.bin
26cd4b7c216739b2855cf77b0882590b680568829e9e0af8426bb36846f61eed
pdf-font-stream PDF embedded font (sfnt) at offset 0x60AB 3184 bytes
font_01_sfnt_off00006c00.bin
9c3d3e4542b3799b23726f789abbd7d87c7812be8ae7d7f67324ebcf339940e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C00 5628 bytes
font_02_sfnt_off00007f37.bin
d63fd17eea793a48406ec6dbe7c79b72c85223a6ce7043a96265f519b8ff7f05
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F37 9844 bytes