Malicious PDF — malware analysis report

Static analysis result for SHA-256 76c3ea04243b5cf0…

MALICIOUS

PDF

71.7 KB Created: 2020-08-20 00:46:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 159c3c1d25f4536edfd8c6ec51ded66b SHA-1: 1d86e75beedd343a07e719938c21a6ebc72aff80 SHA-256: 76c3ea04243b5cf02ff9685794cf5a09917ba0ed9be71ff76216affaab63de45
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. This URL is likely used to funnel victims to a phishing page or download further malware. The document also contains a large number of embedded links, many of which point to Shopify domains, suggesting an attempt to appear legitimate while masking the malicious redirector.

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=bengali+baul+song+audio
    • http://files.wfgcompass.com/uploads/1/3/0/7/130776489/kikokoxud.pdf
    • http://files.krystalgarner.com/uploads/1/3/1/8/131857315/xubepaziwawakol-vodosigumolel.pdf
    • http://files.floorstogoblog.com/uploads/1/3/0/8/130874238/vowaf-vugow-livofo-vumido.pdf
    • http://files.annakscotti.com/uploads/1/3/1/4/131407918/c15973e3.pdf
    • https://cdn.shopify.com/s/files/1/0437/9380/9557/files/stet_bihar_previous_year_question_paper.pdf
    • https://cdn.shopify.com/s/files/1/0427/8432/5798/files/cassava_flour_processing.pdf
    • https://cdn.shopify.com/s/files/1/0437/1742/7352/files/54637352790.pdf
    • https://cdn.shopify.com/s/files/1/0452/0201/4357/files/french_language_guide_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/zasowexujunazojilufepajob.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/35679391278.pdf
    • https://cdn.shopify.com/s/files/1/0431/3474/6790/files/kunipuwexelajozotonez.pdf
    • https://cdn.shopify.com/s/files/1/0438/5649/4757/files/terukoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5962/files/gefozagajabenufesipu.pdf
    • https://cdn.shopify.com/s/files/1/0428/1594/6911/files/tovivesofabejixukemizevo.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/fil

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7b5.bin
bd28f9f4e1abd61feba7ca79a204d8e3cf2de02b52ec6a1b966f027f8b6db5aa
pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B5 5088 bytes
font_01_sfnt_off0000e905.bin
0c3de801c9d0f02e551053f234b3e0191d0e24517433704928a9bf5bda2e7b56
pdf-font-stream PDF embedded font (sfnt) at offset 0xE905 12792 bytes