Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef2075fa044678af…

MALICIOUS

PDF

66.8 KB Created: 2020-08-08 15:41:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 154d688dca32677939a5ef7794d8237a SHA-1: 223ff0b2d6256a898ed8775ac173f4e69fb42101 SHA-256: ef2075fa044678afd75d0c49c6b54c7302d4e780df122b123427c411f2942337
152 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific malicious redirector URL. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that the embedded link `https://ttraff.cc/pify?keyword=mathematics+in+nature+essay+pdf` leads to known malicious infrastructure. The PDF_SEO_LINK_FARM heuristic suggests a large number of outbound links, likely for SEO manipulation or to host further malicious content. The ML classifier also strongly indicated maliciousness.

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=mathematics+in+nature+essay+pdf
    • http://files.mymaryjanerehab.com/uploads/1/3/0/8/130815009/kodowowudes.pdf
    • http://files.littleislandrusticresort.com/uploads/1/3/2/7/132740285/kimudisoxoru.pdf
    • http://files.ranchosandiegopopwarner.com/uploads/1/3/1/4/131412235/1994b7bb7e746c2.pdf
    • http://files.fabianwahl.de/uploads/1/3/0/8/130874567/3266426.pdf
    • https://cdn.shopify.com/s/files/1/0431/5768/4375/files/23534657196.pdf
    • https://cdn.shopify.com/s/files/1/0438/8188/9960/files/iti_engineering_drawing_question_paper_2020.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5807/files/27712424460.pdf
    • https://cdn.shopify.com/s/files/1/0433/9885/6867/files/boost_your_self_confidence.pdf
    • https://cdn.shopify.com/s/files/1/0431/6980/8550/files/lerotuvabodewusegu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3206/7739/files/83406713639.pdf
    • https://cdn.shopify.com/s/files/1/0432/4117/7252/files/56144815666.pdf
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/qaseeda_burda_shareef_lyrics_in_arabic.pdf
    • https://cdn.shopify.com/s/files/1/0435/6138/6147/files/nelax.pdf
    • https://cdn.shopify.com/s/files/1/0433/6759/6184/files/jekidegoga.pdf
    • https://cdn.shopify.com/s/files/1/0429/3486/1991/files/zerefatilotodixugimej.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_off0000c90e.bin
7d262853285a9b5bb9d982d532d929771e69f57b08627c4f65dc2103b0abc68b
pdf-font-stream PDF embedded font (sfnt) at offset 0xC90E 5472 bytes
font_01_sfnt_off0000db94.bin
62cd681b01fd12fa16f8ea25bf4a1583717f01a251977d9aa998078e0f5799ad
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB94 10088 bytes