Malicious PDF — malware analysis report

Static analysis result for SHA-256 60fb85a9be0d2fb0…

MALICIOUS

PDF

40.2 KB Created: 2020-08-05 13:26:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aeb2c1528e334b19ce0a10e741fbe965 SHA-1: 7ddd9dff243de577d16d5827d1591b3dc107acf2 SHA-256: 60fb85a9be0d2fb0385f91b5b0f3be7ff089caecfa2a195e21c24f0360959a33
154 Risk Score

Malware Insights

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

The PDF contains a link farm and redirects to a known malicious URL, indicating a phishing or redirection attempt. The embedded URLs and the document body, despite being obfuscated, suggest an attempt to disguise malicious links under the guise of legitimate content. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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.com/pify?keyword=hallelujah+chorus+violin+sheet+music+pdf
    • http://zejanaji.jennifermariehealingarts.com/uploads/1/3/0/7/130775413/a2450ba3d7d6b.pdf
    • http://files.ccmasonicdesigns.com/uploads/1/3/0/7/130776162/dizazudotedu-zutawup-xerebidojofe-rarilesuxo.pdf
    • http://files.thewriterandtheriver.com/uploads/1/3/0/7/130775639/minotidobibage.pdf
    • http://files.nprycetest.com/uploads/1/3/2/6/132695244/f988a6.pdf
    • http://files.shannondrhodes.com/uploads/1/3/0/8/130873907/1944747.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9432/7975/files/12418583285.pdf
    • https://cdn.shopify.com/s/files/1/0428/7083/3319/files/mokoxomuzamixukinug.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/45927795399.pdf
    • https://cdn.shopify.com/s/files/1/0431/1177/6416/files/24380864034.pdf
    • https://cdn.shopify.com/s/files/1/0431/2354/0124/files/jutaninubomup.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/learn_kannada_through_english.pdf
    • https://cdn.shopify.com/s/files/1/0431/5381/7762/files/jonujitosapukala.pdf
    • https://cdn.shopify.com/s/files/1/0434/1265/2194/files/21634477897.pdf
    • https://cdn.shopify.com/s/files/1/0430/5901/9933/files/43593162883.pdf
    • https://cdn.shopify.com/s/files/1/0430/4922/2298/files/85407413794.pdf
    • https://cdn.shopify.com/s/files/1/0430/6812/9431/files/labanumuren.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_off00005dbc.bin
bb24e5cf1692ca768affe5d4e82d007a3d7bdc2d86d21303cc73d610981268f5
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DBC 5492 bytes
font_01_sfnt_off00007048.bin
048cd599e3ecea0e47d281539e2ae2afdf59b5289011a0133b6a8430b255086d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7048 10396 bytes