Malicious PDF — malware analysis report

Static analysis result for SHA-256 60995649274a46a9…

MALICIOUS

PDF

46.9 KB Created: 2020-07-28 07:16:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eecbd7d5ec16f3de37713618e52e222f SHA-1: eb3d6b664bcd62fd9bf9f1338ac5ce59463d97dd SHA-256: 60995649274a46a9ed4919ef30cb483934ef906308c3fd7880a353a0c8ffbddf
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. It also exhibits characteristics of a link farm, with numerous embedded URLs, many of which are to Shopify-hosted PDFs. The ML classifier strongly indicates maliciousness. The embedded content, though heavily obfuscated, suggests an attempt to disguise the malicious link as legitimate content related to geometry problems.

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=geometry+problems+worksheet+and+answers
    • http://files.astrologervaranasi.com/uploads/1/3/0/8/130815095/xuwigolimi.pdf
    • http://files.thegoldentreatment.com/uploads/1/3/1/4/131410094/bb82e027a57fdf.pdf
    • http://files.mtzionucc.org/uploads/1/3/1/6/131637178/rowetuga.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/3165/7638/files/48729356203.pdf
    • https://cdn.shopify.com/s/files/1/0437/8384/8097/files/67673905528.pdf
    • https://cdn.shopify.com/s/files/1/0430/5921/6533/files/18416035591.pdf
    • https://cdn.shopify.com/s/files/1/0430/7078/3645/files/72677655847.pdf
    • https://cdn.shopify.com/s/files/1/0431/5732/3933/files/jodexizosidokozupevizame.pdf
    • https://cdn.shopify.com/s/files/1/0434/1104/6561/files/jubularim.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/39535416375.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/laxefasigapabaxirasu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5560/4134/files/7597564691.pdf
    • https://cdn.shopify.com/s/files/1/0434/2553/0005/files/81293840227.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xigemeziguvego.pdf
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/23197614029.pdf
    • https://cdn.shopify.com/s/files/1/0428/3197/0460/files/8173913981.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_off000079a9.bin
88764288ce4f79ecbc01bbf59285d0fa35314285347d750f24d387aa4996f32c
pdf-font-stream PDF embedded font (sfnt) at offset 0x79A9 5368 bytes
font_01_sfnt_off00008bd4.bin
9c1b1bab015aeb78f5af71b2c4b2411f544b65c61c8d2f67cf6c42600ac8bee6
pdf-font-stream PDF embedded font (sfnt) at offset 0x8BD4 10152 bytes