Malicious PDF — malware analysis report

Static analysis result for SHA-256 2742ccec0127ddac…

MALICIOUS

PDF

41.3 KB Created: 2020-08-07 05:09:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cfe2ed183f580634505982c169f2dda6 SHA-1: 0ffab2cd696c0ffdbd8d390e9bb475f3a20c32a5 SHA-256: 2742ccec0127ddac699a35465e43316f6fa9031ce6120ea1dc9f6cf9a2b59798
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to domains known for hosting link farms or redirecting to malicious content. The primary heuristic firing indicates the document links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains URLs that are likely part of this link farm, attempting to lure users to potentially harmful sites.

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=pilot+operated+relief+valve+pdf
    • http://files.easthamptonartscouncil.org/uploads/1/3/1/4/131483154/posobun.pdf
    • http://files.shannondrhodes.com/uploads/1/3/0/8/130873907/1944747.pdf
    • http://files.silverjewellerybypeterkibbles.com/uploads/1/3/2/7/132740377/5903586f5.pdf
    • http://files.v23next.com/uploads/1/3/0/8/130813768/rililu.pdf
    • http://files.brunnerfarm.net/uploads/1/3/1/4/131437683/mevekixujaso-ximefumujop-puvunolegaxojit-nunusa.pdf
    • https://cdn.shopify.com/s/files/1/0433/2437/5194/files/vowepas.pdf
    • https://cdn.shopify.com/s/files/1/0430/3860/5461/files/98902043272.pdf
    • https://cdn.shopify.com/s/files/1/0435/0004/4454/files/devajaziposefejudej.pdf
    • https://cdn.shopify.com/s/files/1/0427/5834/0774/files/99271119483.pdf
    • https://cdn.shopify.com/s/files/1/0435/3179/6634/files/biomedicina_estetica.pdf
    • https://cdn.shopify.com/s/files/1/0437/0753/1432/files/61208409923.pdf
    • https://cdn.shopify.com/s/files/1/0430/5184/3737/files/teninegonirexezibo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8475/9711/files/74173796746.pdf
    • https://cdn.shopify.com/s/files/1/0438/8628/0872/files/tomonaxegopa.pdf
    • https://cdn.shopify.com/s/files/1/0437/6913/5262/files/streptococcus_agalactiae_en_el_embarazo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0081/4998/files/5258380374.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_off0000661f.bin
3599f43d8b5028c344d4f2b916f9229aafa61af64ccef84e585a20b10cf9faeb
pdf-font-stream PDF embedded font (sfnt) at offset 0x661F 4916 bytes
font_01_sfnt_off000076ef.bin
0ab2fe02e83fd00c1dfea705d3c6b00584ee55a60153717435e8c542fe233e5f
pdf-font-stream PDF embedded font (sfnt) at offset 0x76EF 9748 bytes