Malicious PDF — malware analysis report

Static analysis result for SHA-256 db5ce7163e082e0a…

MALICIOUS

PDF

43.9 KB Created: 2020-08-30 12:17:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5938cfd0d14dfa720ca9d26117e1d83 SHA-1: b49d6974bd46240a82c486baabede800489f8e98 SHA-256: db5ce7163e082e0a948beb9176182752ec8ba5f237e00d818fcae07fbbe36d0a
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.ru, which is likely used to direct users to malicious content. The document body, though heavily obfuscated, contains the same URL and a seemingly unrelated document title, suggesting a lure. The presence of numerous benign-looking Shopify links is likely part of a link farm to improve SEO for 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.ru/wix?keyword=chor+chor+super+chor+full+movie+online
    • https://cdn.shopify.com/s/files/1/0429/8083/5482/files/legrand_cable_ladder_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0435/0060/1504/files/shampoodle_animal_crossing_hair_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/1274/3580/files/60517471579.pdf
    • https://cdn.shopify.com/s/files/1/0428/7866/4867/files/igt_slot_machine_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/7486/2758/files/ocr_biology_examiners_report_2018.pdf
    • https://cdn.shopify.com/s/files/1/0427/9051/8940/files/dit_virus_apkpure.pdf
    • https://cdn.shopify.com/s/files/1/0433/0268/2789/files/nipivozonofago.pdf
    • https://cdn.shopify.com/s/files/1/0427/9818/6652/files/33128359403.pdf
    • https://cdn.shopify.com/s/files/1/0433/8188/3030/files/44488974135.pdf
    • https://cdn.shopify.com/s/files/1/0428/8544/7833/files/82890991990.pdf
    • https://cdn.shopify.com/s/files/1/0430/7730/4484/files/73531762159.pdf
    • https://static.usrfiles.com/ugd/b8c837_8479371d19b44e2cbf5b22b5ffaed65b.pdf
    • https://static.usrfiles.com/ugd/eda9ba_7658a9f8f8ed4cbc9af05ef636705e1a.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006100.bin
83fbe28a5e3de8d7ad9acf9fb88b494f6ca9937d4b6d10fa01d8fee069fad566
pdf-font-stream PDF embedded font (sfnt) at offset 0x6100 4928 bytes
font_01_sfnt_off000071a0.bin
42d7e8358786c09e67c2d310f2497c96473c71f1ab76a727ff65e7ae152bbeee
pdf-font-stream PDF embedded font (sfnt) at offset 0x71A0 10296 bytes
font_02_sfnt_off000094aa.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x94AA 4324 bytes