Malicious PDF — malware analysis report

Static analysis result for SHA-256 df2246f92b267d14…

MALICIOUS

PDF

50.1 KB Created: 2020-07-31 14:04:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1cb5fef848c84e01cad8d66557945b35 SHA-1: 7d22bb251828b21e46e4146d97e95a1886f528fa SHA-256: df2246f92b267d1477bfddd2a61f03af89c48c6690d0203c944f9ab0bfcaef18
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=venomous+fishes+pdf'. Additionally, a PDF SEO link farm heuristic indicates the document is designed to host numerous external links. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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=venomous+fishes+pdf
    • http://files.cml-mpn.com/uploads/1/3/1/3/131382330/8002964.pdf
    • http://files.biophysical-ecology.com/uploads/1/3/1/4/131406356/xivut_girusidusowele_finusagon.pdf
    • http://files.pcbaseballacademy.com/uploads/1/3/0/8/130813762/romubalosato.pdf
    • http://files.sassyarabia.com/uploads/1/3/1/6/131606984/2834785.pdf
    • http://files.sassyarabi
    • https://cdn.shopify.com/s/files/1/0437/6556/3541/files/56661135262.pdf
    • https://cdn.shopify.com/s/files/1/0433/7152/8344/files/48274296267.pdf
    • https://cdn.shopify.com/s/files/1/0437/2152/3349/files/lepokirodaw.pdf
    • https://cdn.shopify.com/s/files/1/0440/8446/1720/files/86057950598.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27039997465.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/doravamisokixuba.pdf
    • https://cdn.shopify.com/s/files/1/0430/2176/2723/files/94203372626.pdf
    • https://cdn.shopify.com/s/files/1/0431/9461/3924/files/mexutotugo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6335/3244/files/96352539378.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9560/files/27017001894.pdf
    • https://cdn.shopify.com/s/files/1/0431/8615/9767/files/lirotutubosumelafinaxufer.pdf
    • https://cdn.shopify.com/s/files/1/0431/2494/9153/files/razezi.pdf
    • https://cdn.shopify.com/s/files/1/0441/1057/7816/files/lanivalofabejixanuz.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000895e.bin
f16830d5e8ea7a7acad225334a33497219bff0e1082366bd93c4317e64e37aac
pdf-font-stream PDF embedded font (sfnt) at offset 0x895E 4712 bytes
font_01_sfnt_off00009931.bin
b25387f8dac5f4522fe0940d6b50f2b2ae4102887efc1aaab90eeb82e541a546
pdf-font-stream PDF embedded font (sfnt) at offset 0x9931 10072 bytes