Malicious PDF — malware analysis report

Static analysis result for SHA-256 e701da53605f6dce…

MALICIOUS

PDF

52.6 KB Created: 2020-08-23 19:47:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9aeff2536451b1f0c0519f16f6bf14d SHA-1: 3e6c632f75f3e80a90c91f5643612e3becb2d835 SHA-256: e701da53605f6dceca04042d065e855717b8a144898cfab3da037019807a87e2
152 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific redirector URL that is known to be malicious. The document body, though heavily obfuscated, contains text related to a Bose product manual and the malicious URL, suggesting a phishing or scam attempt. The ML classifier strongly indicated maliciousness, and the PDF structure itself was flagged for containing a mass external link farm.

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=bose+quietcomfort+qc35+ii+manual
    • http://jobamuto.tarshascandlesandsoaps.com/uploads/1/3/1/4/131454859/kagijaxa.pdf
    • http://jutokixu.mystartjournal.com/uploads/1/3/0/7/130740069/nitasetezipodo.pdf
    • http://jiretinid.infiniteecoclean.com/uploads/1/3/1/3/131381679/71a20d5c3620.pdf
    • http://xuzoxif.jweinsteinlaw.com/uploads/1/3/1/4/131438096/8944131.pdf
    • http://files.getcartparts.com/uploads/1/3/1/8/131871614/2552448.pdf
    • https://cdn.shopify.com/s/files/1/0433/1382/3909/files/14150997403.pdf
    • https://cdn.shopify.com/s/files/1/0434/5338/2822/files/bsc_magazine_2019.pdf
    • https://cdn.shopify.com/s/files/1/0430/6586/8437/files/bodies_of_water_worksheets_for_kindergarten.pdf
    • https://cdn.shopify.com/s/files/1/0435/1403/6376/files/korogeto.pdf
    • https://cdn.shopify.com/s/files/1/0434/4191/4018/files/bwv_1001_guitar.pdf
    • https://cdn.shopify.com/s/files/1/0439/7950/5822/files/5377068683.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/ralisafaketaxi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7818/0261/files/logitech_g25_drivers.pdf
    • https://cdn.shopify.com/s/files/1/0437/9662/7616/files/uniform_linear_motion_lab_report.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7051/files/57998676967.pdf
    • https://cdn.shopify.com/s/files/1/0431/5686/5173/files/actor_with_1_film_performance_crossword.pdf
    • https://cdn.shopify.com/s/files/1/0429/0471/5427/files/74422869534.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_off00008609.bin
9f7119cc1117c5c76dd0e090dc171723de13dffc351a78c7c77bf540fb38c547
pdf-font-stream PDF embedded font (sfnt) at offset 0x8609 5492 bytes
font_01_sfnt_off000098a6.bin
ecdaf481f5523288117be56cd12d1cd44373d7797e4b0bdba16680296e6d63ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x98A6 14180 bytes