Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c7b8724b50480ca…

MALICIOUS

PDF

42.0 KB Created: 2020-09-11 18:21:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb6bc588bf188899f1dc3a15a98f83b6 SHA-1: 94705e020a8360d5402bf1fab3dbfa5d7885f7f9 SHA-256: 9c7b8724b50480ca1a050209a6744e93e400efad13230f9f0e6b3f82636ad431
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.me'. The document body, though heavily obfuscated, contains text related to 'anesthesia powerpoint templates free' and the malicious URL, suggesting a lure. The PDF also contains a link farm heuristic, indicating a large number of external links, with the primary one being the malicious redirector. No scripts were extracted from this sample.

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.me/wix?keyword=anesthesia+powerpoint+templates+free
    • https://static.usrfiles.com/ugd/d954c5_607487f8f4734e91852fcffb078a0956.pdf
    • https://static.usrfiles.com/ugd/440e29_9f549a337cea42aa90150fe7739c63ca.pdf
    • https://static.usrfiles.com/ugd/a12125_b3abb30e7fb94da1ab07d95ee28c578e.pdf
    • https://static.usrfiles.com/ugd/5a4aad_de0fb897e8c44d49b4db2281b64c10ec.pdf
    • https://static.usrfiles.com/ugd/3fb742_86a8c7545a9144b89a76245e903b0970.pdf
    • https://cdn.shopify.com/s/files/1/0431/6971/0241/files/electrical_engineer_job_description.pdf
    • https://cdn.shopify.com/s/files/1/0439/7580/3038/files/faxosarozaxigado.pdf
    • https://cdn.shopify.com/s/files/1/0439/0046/9403/files/leatherworking_guide_wotlk_1-_450.pdf
    • https://static.usrfiles.com/ugd/95bb70_001b370489634177bfd2de937ae8d7f1.pdf
    • https://static.usrfiles.com/ugd/c4f63d_3f8313d1a4814652bf1b74e655dc18b4.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8311/files/80122916024.pdf
    • https://cdn.shopify.com/s/files/1/0430/3467/3301/files/zobodedanejaveb.pdf
    • https://cdn.shopify.com/s/files/1/0429/6572/9429/files/85350420349.pdf
    • https://cdn.shopify.com/s/files/1/0434/6871/8233/files/61917475139.pdf
    • https://cdn.shopify.com/s/files/1/0435/5666/7541/files/writing_an_artist_statement.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_off00006737.bin
db94639dd292b7b53ceb4679413a81c70b02f7ef4eead2463f40010f49da6b5d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6737 5220 bytes
font_01_sfnt_off000078e1.bin
f4291db9fa64eca493bed9a8ac87d3e1e255998380dcc1426b31f44bea6a0df1
pdf-font-stream PDF embedded font (sfnt) at offset 0x78E1 9932 bytes