Malicious PDF — malware analysis report

Static analysis result for SHA-256 e074a6f8a4a64552…

MALICIOUS

PDF

63.4 KB Created: 2020-08-25 04:51:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17aa6aa555d1db03226b1a6ef018a8ba SHA-1: bfa53bf0cb8860b9a85934ddc93822409baa5d06 SHA-256: e074a6f8a4a645521788ca4bcf1b0219b581dd613213355df8654740e083ecd6
152 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 text related to 'Pmp certification questions and answers 2017' and the malicious URL. The PDF also exhibits characteristics of a link farm, with numerous embedded links to external PDFs, many hosted on cdn.shopify.com.

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=pmp+certification+questions+and+answers+2017
    • http://files.countrywalkvet.com/uploads/1/3/0/7/130776682/gumazuvipagid_benufureju.pdf
    • http://files.artuk.co/uploads/1/3/2/7/132741397/2438046.pdf
    • https://cdn.shopify.com/s/files/1/0439/1682/0635/files/82449420319.pdf
    • https://cdn.shopify.com/s/files/1/0432/4143/9400/files/kefos.pdf
    • https://cdn.shopify.com/s/files/1/0432/5572/6238/files/gogopala.pdf
    • https://cdn.shopify.com/s/files/1/0435/1141/4943/files/89673176145.pdf
    • https://cdn.shopify.com/s/files/1/0433/9705/4631/files/pujinosoxam.pdf
    • https://cdn.shopify.com/s/files/1/0433/0012/6885/files/kizepababidupepuvipuwin.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7957/files/54455400809.pdf
    • https://cdn.shopify.com/s/files/1/0432/2403/9592/files/8603685642.pdf
    • https://cdn.shopify.com/s/files/1/0429/7654/2873/files/87334135120.pdf
    • https://cdn.shopify.com/s/files/1/0436/4537/0521/files/60532106167.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/
    • https://cdn.shopify.com/s/files/1/0435/1141/4943/files/8967317

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b4ee.bin
875e42d894f219ce53c353626a25e3b534870ddf1caac2e3f3dfda3337bd9269
pdf-font-stream PDF embedded font (sfnt) at offset 0xB4EE 5896 bytes
font_01_sfnt_off0000c8fa.bin
af1d52a828bf8e82232e4db82629780558f0e0ee4092d2a9c863c56caf0203da
pdf-font-stream PDF embedded font (sfnt) at offset 0xC8FA 11104 bytes