Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7b02d9217a4c41b…

MALICIOUS

PDF

39.5 KB Created: 2020-07-29 12:33:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1064c7bd8e897ef874dce66322a474b5 SHA-1: 4b3ce01b5d7b91d12e8fddd9281dded4a89a4221 SHA-256: e7b02d9217a4c41b5d08e59d1f876034f136ceb96a90f9e2d9eefc0041378fef
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by a machine learning classifier as malicious and contains a high number of embedded links. One of these links points to a known malicious redirector, ttraff.cc. The document body appears to be corrupted or obfuscated, but the presence of numerous external links suggests a malicious intent, possibly for SEO manipulation or to distribute further malware. 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=vocabulaire+th%25C3%25A9matique+anglais+fran%25C3%25A7ais+pdf
    • http://files.howellcrossroads.org/uploads/1/3/1/8/131856456/5f8420.pdf
    • http://files.fullfledgedonline.com/uploads/1/3/0/9/130969735/solenipesuxugujopuki.pdf
    • http://files.jenyoungskincare.com/uploads/1/3/1/4/131438418/xowirumexototi_sawus_zubiruga_rixak.pdf
    • http://files.whisperofspirit.com/uploads/1/3/1/4/131408245/3178742d4ceecc2.pdf
    • http://files.therecruiterjournal.com/uploads/1/3/0/9/130969862/pudukoxateboli.pdf
    • https://cdn.shopify.com/s/files/1/0431/5109/8007/files/45340265188.pdf
    • https://cdn.shopify.com/s/files/1/0434/2611/9831/files/75260974192.pdf
    • https://cdn.shopify.com/s/files/1/0431/2760/3354/files/jamivojazuxide.pdf
    • https://cdn.shopify.com/s/files/1/0437/3676/0485/files/87795761872.pdf
    • https://cdn.shopify.com/s/files/1/0427/8996/1884/files/67343072871.pdf
    • https://cdn.shopify.com/s/files/1/0435/0830/1989/files/boluvezawa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9318/1087/files/13731828981.pdf
    • https://cdn.shopify.com/s/files/1/0431/7229/8918/files/zuxinigogunelavudito.pdf
    • https://cdn.shopify.com/s/files/1/0431/6879/2733/files/tezoda.pdf
    • https://cdn.shopify.com/s/files/1/0433/0084/7781/files/58298471713.pdf
    • https://cdn.shopify.com/s/files/1/0439/8628/8798/files/93830599205.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/
    • https://cdn.shopify.com/s/files/1/0431/2760/3354/files

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059b2.bin
d77ca72f94d3b8b08951fab128e9be0f669e96f06bb9a57f4278a46fbf88b34e
pdf-font-stream PDF embedded font (sfnt) at offset 0x59B2 6008 bytes
font_01_sfnt_off00006d5b.bin
29ee4831867c296209656053fb9c0c0bd3960442793f8a7090509ce406d88722
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D5B 10052 bytes