Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d858ca1d194c31a…

MALICIOUS

PDF

67.6 KB Created: 2020-08-12 21:32:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e67f93ea55d47a5456927c05671a233f SHA-1: b5def1a15759f8bb44f9ab6695eb96558cf23beb SHA-256: 4d858ca1d194c31a0348e08e7c94ac1a5d9a226b9c85e799f7094c792d08e5d3
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on 'cdn.shopify.com', likely to obscure the malicious redirector.

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=third+law+of+thermodynamics+examples+pdf
    • http://files.agiteysirva.com/uploads/1/3/1/4/131453695/minitokateka.pdf
    • http://files.thebestpartofordinary.com/uploads/1/3/1/1/131164023/2b93cca0b81e8.pdf
    • http://files.sklgtraining.com/uploads/1/3/0/8/130814535/nuliketo.pdf
    • http://files.nationsmidwifery.com/uploads/1/3/1/3/131379321/271299.pdf
    • http://files.agiteysirva.com/uploads/1/3/1/4/131453695
    • https://cdn.shopify.com/s/files/1/0435/8039/1585/files/popawapukafipimelokilezu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8221/1735/files/baloxirupobixa.pdf
    • https://cdn.shopify.com/s/files/1/0435/4765/6351/files/86518480099.pdf
    • https://cdn.shopify.com/s/files/1/0433/2073/7950/files/8561157274.pdf
    • https://cdn.shopify.com/s/files/1/0432/4933/6483/files/the_ritual_magic_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/9038/5821/files/atls_manual_9th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0435/5365/2895/files/saris_fit_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/8924/7894/files/sutamikokezifiselonokudum.pdf
    • https://cdn.shopify.com/s/files/1/0447/7861/9029/files/list_of_amino_acids_and_their_structures.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28650507632.pdf
    • https://cdn.shopify.com/s/files/1/0435/2249/0532/files/probiotics_in_fermented_foods.pdf
    • https://cdn.shopify.com/s/files/1/0427/4287/4278/files/50068510133.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_off0000a418.bin
5399a12fc07781f3f85c5efc7e392bde057fe34c99839453adce824505d36506		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA418 5604 bytes
font_01_sfnt_off0000b71f.bin
692a22fc401dcad5711ec97f0f70dc61346d0b65cd4feba6de7701b9b4e42739		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB71F 16820 bytes
font_02_sfnt_off0000ebdf.bin
1445775b9a23a908738d4b50a39a0185987e6b0dbf67120e278101207b724a2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDF 16064 bytes

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