Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1243a0209b498d7…

MALICIOUS

PDF

57.0 KB Created: 2020-08-23 16:44:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21a31cd21db0596a6108e97d6def07de SHA-1: 2de31255f40bd4062736fb3aed9e225d049f48bd SHA-256: f1243a0209b498d7b23ac4868c43b918490ccb373aa1ddfc67bbcb47988c0ef7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass of external links, many pointing to shopify.com, but one critical link redirects to a known malicious domain (ttraff.ru). The document body, though obfuscated, contains text related to an obituary template, suggesting a social engineering lure. The ML classifier strongly indicates maliciousness, and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the presence of a malicious redirector. The primary attack pattern involves tricking the user into clicking the malicious link, which then likely leads to further compromise.

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/pify?keyword=sample+obituary+template+for+father
    • http://files.ndpharmabiotech.net/uploads/1/3/1/4/131452735/6476646.pdf
    • http://files.bcdpartistry.com/uploads/1/3/1/3/131383931/5445231.pdf
    • http://files.freebackgroundphotos.com/uploads/1/3/0/9/130969659/ribuwamagunazu_viwalitom_waninozenowig_gesetekupege.pdf
    • http://files.suetastic.com/uploads/1/3/0/7/130740551/1608866.pdf
    • https://cdn.shopify.com/s/files/1/0440/6139/3046/files/allen_carr_smoking_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/3935/9127/files/fafunewekuvupoxos.pdf
    • https://cdn.shopify.com/s/files/1/0430/6462/3265/files/58324079272.pdf
    • https://cdn.shopify.com/s/files/1/0434/1897/6414/files/pentecostal_and_charismatic_movement_in_ghana.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kividerinogofigizunewif.pdf
    • https://cdn.shopify.com/s/files/1/0433/3892/4181/files/tilus.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1261535930.pdf
    • https://cdn.shopify.com/s/files/1/0427/9782/6207/files/dotobesojusaloroz.pdf
    • https://cdn.shopify.com/s/files/1/0438/6881/5528/files/monster_races_5e.pdf
    • https://cdn.shopify.com/s/files/1/0433/6985/7180/files/matesizodosam.pdf
    • https://cdn.shopify.com/s/files/1/0437/2040/9256/files/tegupodafozoz.pdf
    • https://cdn.shopify.com/s/files/1/0437/8384/8093/files/calculus_eighth_edition_larson_hostetler_edwards.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_off00008273.bin
2f72c9f0e2808a128f0f47e97fb3e41a7312cf01adcf2cbe3839b597afccc681		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8273 5308 bytes
font_01_sfnt_off00009460.bin
819052fc46c4ece5f7ff79a2b5b7495d64aa366afdcc8942794c46d10bf8765c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9460 13644 bytes
font_02_sfnt_off0000bfbe.bin
4b52fd5da643d9c08cc0a86f773b2f024e3274f3f861dfcac100db1ef433cf06		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBFBE 16164 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.