Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc6080dcfdf3cbff…

MALICIOUS

PDF

35.4 KB Created: 2020-08-23 03:20:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d031e2a8cbad751672f4d8b0cd15e0b9 SHA-1: d09e299ca3461917dda334373e4f47f9a113dd71 SHA-256: dc6080dcfdf3cbffb94ceaecd5422865c2ea2f285edd7c227c927b613e13d1b2
152 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous embedded URLs, many pointing to Shopify domains, likely for SEO manipulation. One critical heuristic identified a direct link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=logo+quiz+ultimate+level+3+answers'. The document body also contains this URL, suggesting it's the primary lure. The ML classifier strongly supports the malicious nature of this PDF.

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=logo+quiz+ultimate+level+3+answers
    • http://files.sophiesemporium.shop/uploads/1/3/2/6/132681946/893691.pdf
    • http://bejeledat.friendsofstandrews.org/uploads/1/3/0/7/130775934/vowovewetupab.pdf
    • http://files.tropicalduckies.com/uploads/1/3/1/0/131070508/4ea6904605e1.pdf
    • https://cdn.shopify.com/s/files/1/0435/6256/5795/files/46221299053.pdf
    • https://cdn.shopify.com/s/files/1/0428/9642/5119/files/21547977343.pdf
    • https://cdn.shopify.com/s/files/1/0429/6749/8911/files/tugopuvorakixo.pdf
    • https://cdn.shopify.com/s/files/1/0429/4760/8730/files/foritugavugujewifexa.pdf
    • https://cdn.shopify.com/s/files/1/0430/0200/3609/files/886902268.pdf
    • https://cdn.shopify.com/s/files/1/0433/6723/5742/files/vemomixogozijaladopofiga.pdf
    • https://cdn.shopify.com/s/files/1/0436/1139/0115/files/vokererimuvofagi.pdf
    • https://cdn.shopify.com/s/files/1/0437/7028/2142/files/16963183001.pdf
    • https://cdn.shopify.com/s/files/1/0443/8805/7254/files/docker_rm_all.pdf
    • https://cdn.shopify.com/s/files/1/0431/0279/7986/files/rikogonuxabefijatam.pdf
    • https://cdn.shopify.com/s/files/1/0434/8674/0646/files/mean_median_mode_formula_statistics.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jenodilibaxu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/dasezuvodiwizemitel.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/baby_school_bus_game.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_off00004bd7.bin
7bf7a2c41ed920fbdfa62d649ca8d41995d4511ef557351c1891dd33819eae94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BD7 5436 bytes
font_01_sfnt_off00005e5f.bin
af3e9f51d10d12593c184602eaa2a7cf2d2191bacdec58804e94fcdcd486767d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E5F 10196 bytes

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