Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5b4fb7c5724cb31…

MALICIOUS

PDF

44.9 KB Created: 2020-08-06 23:00:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df06e1df8a5214a07360f2e6a2aa2c1d SHA-1: f5f3e6950e0495d67c591ca18a389218f04b69c6 SHA-256: e5b4fb7c5724cb3122dadf501826a11a14a70c471dc3d0cf0e8c622823fdbebc
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to 'anti inflammatory foods shopping list pdf' and the malicious URL 'https://ttraff.ru/pify?keyword=anti+inflammatory+foods+shopping+list+pdf'. This suggests the document is designed to lure users to malicious sites under the guise of providing a shopping list, likely for phishing or malware distribution.

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=anti+inflammatory+foods+shopping+list+pdf
    • http://files.annalisanicole.com/uploads/1/3/1/8/131857199/ruxug.pdf
    • http://files.makinitinthemitten.com/uploads/1/3/1/4/131483266/ae81a131.pdf
    • http://files.citycentrechurch.ca/uploads/1/3/1/3/131379706/deveto.pdf
    • http://files.ezipassholder.com/uploads/1/3/1/3/131379875/63c50c5a17e8.pdf
    • https://cdn.shopify.com/s/files/1/0434/9339/2536/files/badepodutasazenanofibuzo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kozaw.pdf
    • https://cdn.shopify.com/s/files/1/0436/0532/8034/files/bomejojuzikenoxijadiredes.pdf
    • https://cdn.shopify.com/s/files/1/0429/8362/0757/files/dubuxijuremugifugajor.pdf
    • https://cdn.shopify.com/s/files/1/0435/9002/5375/files/1143270466.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zisavugeti.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7296/files/xaligukegexeduvibunudo.pdf
    • https://cdn.shopify.com/s/files/1/0437/9066/3832/files/77206524584.pdf
    • https://cdn.shopify.com/s/files/1/0429/3486/1991/files/48014614987.pdf
    • https://cdn.shopify.com/s/files/1/0434/6619/5106/files/jolameg.pdf
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/16479736856.pdf
    • https://cdn.shopify.com/s/files/1/0428/6670/4550/files/how_to_reinstall_directx.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_off00006fef.bin
fce2d2236f35a083be4006372342d98610bbad0c47059fa045854045c70209de
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FEF 5544 bytes
font_01_sfnt_off000082b0.bin
f76644fc50a8eb77c4d009d33ea3603de71bf4c3f8f1e23d268abacfe13434ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x82B0 10292 bytes