Malicious PDF — malware analysis report

Static analysis result for SHA-256 3265f5a8a6cb8509…

MALICIOUS

PDF

55.0 KB Created: 2020-08-04 23:09:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f90758322f14dcdfafa8366eb6a65d54 SHA-1: 93f186a795a58de6508945ad2c833e832a7c1f53 SHA-256: 3265f5a8a6cb85098da9c4669d25adbe429394d92379a77f13b238b9b2451007
152 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting a lure to a malicious site. 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.com/pify?keyword=que+es+quimica+organica+pdf
    • http://files.kg-games.com/uploads/1/3/1/1/131163736/ralujunebunupem-kuvatijijek-vulixesit-pinavowobom.pdf
    • http://files.ttautothunderbay.com/uploads/1/3/1/3/131381612/vinar-majevoga.pdf
    • http://files.chathamhighlandsna.com/uploads/1/3/0/7/130738769/509478.pdf
    • https://cdn.shopify.com/s/files/1/0433/6327/0815/files/gogeriseseriwiwejagaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/7956/5465/files/illustrated_encyclopedia_of_animal_life.pdf
    • https://cdn.shopify.com/s/files/1/0432/4461/7885/files/pejageluwipedi.pdf
    • https://cdn.shopify.com/s/files/1/0430/4312/7447/files/3931319218.pdf
    • https://cdn.shopify.com/s/files/1/0430/6652/3809/files/t25_workout_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0440/3740/6870/files/masije.pdf
    • https://cdn.shopify.com/s/files/1/0440/6706/1910/files/anatomy_lab_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/3305/9737/files/quick_sort_algorithm.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/rosetta_stone_crack.pdf
    • https://cdn.shopify.com/s/files/1/0432/6585/1560/files/99229081533.pdf
    • https://cdn.shopify.com/s/files/1/0433/3391/0681/files/cool_math_jacksmith.pdf
    • https://cdn.shopify.com/s/files/1/0432/9262/2998/files/biperideno_bula_profissional.pdf
    • https://cdn.shopify.com/s/files/1/0429/0176/6310/files/67358560112.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_off00009603.bin
3083e63200ffcf687ef14d8f18d39d2dbec2ccc4ef8bbda77d911424a9a70e15
pdf-font-stream PDF embedded font (sfnt) at offset 0x9603 5632 bytes
font_01_sfnt_off0000a907.bin
22422ebbff7a243a63d2fd1e314b3aa6e9208619ff4923d23055b4c5e97e41cd
pdf-font-stream PDF embedded font (sfnt) at offset 0xA907 11212 bytes