Malicious PDF — malware analysis report

Static analysis result for SHA-256 73eca922e722e799…

MALICIOUS

PDF

48.2 KB Created: 2020-08-14 01:39:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c000a1f6956a66a6c5c731ae50db06b6 SHA-1: 2ccf29a18b76ca75a3c0ce9ae17508b7530ff310 SHA-256: 73eca922e722e799ed3c90aef4ab5e148b41067133fd1ff3a33e3a98e5fe7b1a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a mass of external links, many pointing to Shopify, but one critical link redirects to a known malicious infrastructure at 'ttraff.ru'. This suggests a link farm or SEO poisoning tactic designed to drive traffic to malicious sites. The document body, though heavily obfuscated, contains the target URL and a deceptive anchor text, indicating a phishing or scam attempt.

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=graphic+design+images+free
    • http://files.dizzycoach.com/uploads/1/3/0/8/130874129/redesoba-xurun.pdf
    • http://vebek.madartglass.com/uploads/1/3/1/8/131857920/013bfe4e81da4.pdf
    • http://lekulut.tutorslink123.com/uploads/1/3/0/8/130813848/pogesanopama.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/3260/7894/files/70744504604.pdf
    • https://cdn.shopify.com/s/files/1/0436/1568/2717/files/blender_merge_vertex_groups.pdf
    • https://cdn.shopify.com/s/files/1/0429/2247/5687/files/tutux.pdf
    • https://cdn.shopify.com/s/files/1/0430/5649/6794/files/71116287856.pdf
    • https://cdn.shopify.com/s/files/1/0430/6924/3549/files/definition_of_authentication_information.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/82011542479.pdf
    • https://cdn.shopify.com/s/files/1/0440/4989/1478/files/rasikumixunowabezu.pdf
    • https://cdn.shopify.com/s/files/1/0427/8370/3206/files/72253304551.pdf
    • https://cdn.shopify.com/s/files/1/0437/8951/6962/files/cambridge_audio_dacmagic_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/8386/6007/files/loan_template_agreement.pdf
    • https://cdn.shopify.com/s/files/1/0435/7206/8520/files/marikugirokefate.pdf
    • https://cdn.shopify.com/s/files/1/0438/8981/9800/files/conjugaison_verbe_etre_et_avoir_au_present.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007042.bin
dd564717d14adbc8114c3aacfdc8d870c6c183eaf7c48ce5a54726cddb982163		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7042 5168 bytes
font_01_sfnt_off0000819e.bin
6205897e0ab45dc42e5987f639f1fc6af00e719ee2552dde13cac6f5e257ef89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x819E 10536 bytes
font_02_sfnt_off0000a5a3.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5A3 4324 bytes

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