Malicious PDF — malware analysis report

Static analysis result for SHA-256 7062a3ec8303213b…

MALICIOUS

PDF

59.9 KB Created: 2020-08-04 11:49:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6049b649332e17cb37d967b161057028 SHA-1: 5bdba2646da5d2f1c2c93b7d333d3b7222097043 SHA-256: 7062a3ec8303213b676d311f26c09e0ecd5e7eb09e218aade1170ea1d3b4b0da
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, including a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to direct users to malicious infrastructure. The presence of a malicious redirector link and the sheer volume of embedded links indicate a link farm or phishing attempt.

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.ru/pify?keyword=importance+of+crop+rotation+in+agriculture+pdf
    • http://files.barbernst.com/uploads/1/3/2/6/132681586/4908671.pdf
    • http://files.bayridgerescuesquad.com/uploads/1/3/1/4/131453998/2749204.pdf
    • http://files.fortykes.net/uploads/1/3/2/6/132682235/waburi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/6041/1033/files/siwewenid.pdf
    • https://cdn.shopify.com/s/files/1/0429/6769/5509/files/8278449629.pdf
    • https://cdn.shopify.com/s/files/1/0438/0862/0701/files/vuwutunezadaxejoninarumo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/46022699089.pdf
    • https://cdn.shopify.com/s/files/1/0429/1470/9670/files/14475795962.pdf
    • https://cdn.shopify.com/s/files/1/0431/4903/3640/files/reported_speech_backshift.pdf
    • https://cdn.shopify.com/s/files/1/0435/6145/1681/files/82275113362.pdf
    • https://cdn.shopify.com/s/files/1/0431/8704/4510/files/vobumibitakelibawafuxefu.pdf
    • https://cdn.shopify.com/s/files/1/0435/1960/6936/files/ginoxalidetuv.pdf
    • https://cdn.shopify.com/s/files/1/0437/5543/8234/files/vasowuxajatopebokunu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pepefawabibuf.pdf
    • https://cdn.shopify.com/s/files/1/0434/8579/0365/files/93380270533.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_off0000ac2a.bin
31f5b121c496c51d7f7518bfe51ba42f1e1e424669e2347463093ad5f4930ffd
pdf-font-stream PDF embedded font (sfnt) at offset 0xAC2A 5232 bytes
font_01_sfnt_off0000bde0.bin
4d4f3c4b332d7a2c5a4eedddd8f7fd6ae5a4139cf5fefc204c7e652956410359
pdf-font-stream PDF embedded font (sfnt) at offset 0xBDE0 10560 bytes