Malicious PDF — malware analysis report

Static analysis result for SHA-256 9010e500a09bf201…

MALICIOUS

PDF

46.6 KB Created: 2020-08-02 02:16:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd3b6c657600de4d9e562e59371c6474 SHA-1: c94f8f215ea7279be9b983927b11204f1e8ac39d SHA-256: 9010e500a09bf20196f053818b763e76c25ebe7848984824491fd571d3aaaa2a
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with at least one pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but includes the URL https://ttraff.ru/pify?keyword=autohotkey+always+on+top, suggesting a lure related to 'autohotkey always on top' which redirects to potentially harmful content. The presence of numerous Shopify links, while some are marked benign, indicates a link farm strategy.

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=autohotkey+always+on+top
    • http://files.vompach-haus.com/uploads/1/3/0/7/130776619/vizefomujare-tosaz-pafuvabapuf-fefomaxatof.pdf
    • http://files.glomhi.org/uploads/1/3/1/3/131380687/81eddef2055ce.pdf
    • http://files.ebartists.com/uploads/1/3/1/3/131383727/lejejevetedilofifub.pdf
    • http://files.the-hafizova-hive.com/uploads/1/3/1/4/131406435/042e9da.pdf
    • http://files.mcmillansofmalton.co.uk/uploads/1/3/1/4/131407952/bb2479e52a43f2.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vawis.pdf
    • https://cdn.shopify.com/s/files/1/0429/1634/8057/files/75713398414.pdf
    • https://cdn.shopify.com/s/files/1/0429/7719/8229/files/18573756106.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/zinebevumameruwak.pdf
    • https://cdn.shopify.com/s/files/1/0433/6330/3575/files/52375599100.pdf
    • https://cdn.shopify.com/s/files/1/0430/1848/5923/files/chevy_trailblazer_2017.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0830/files/32925609904.pdf
    • https://cdn.shopify.com/s/files/1/0427/9291/1007/files/junoliraleragamiwo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53151925343.pdf
    • https://cdn.shopify.com/s/files/1/0434/0580/3687/files/10297685586.pdf
    • https://cdn.shopify.com/s/files/1/0432/4042/3592/files/unlimited_keys_and_coins_for_subway_surfers.pdf
    • https://cdn.shopify.com/s/files/1/0435/4893/4295/files/girudekitutalose.pdf
    • https://cdn.shopify.com/s/files/1/0435/9513/7187/files/solidworks_2015_tutorials.pdf
    • https://cdn.shopify.com/s/files/1/0430/2897/1674/files/37570617814.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_off0000787f.bin
27d8d8d9b86336c69754984d3375c02c8622d5df5e95d19ff6cfa0791c441786		 pdf-font-stream PDF embedded font (sfnt) at offset 0x787F 5060 bytes
font_01_sfnt_off000089cc.bin
9d78f9b1f2ca835f82eb9b5d90ec0f932c136635c670ebacdfb554389b5bc7fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89CC 10516 bytes

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