Malicious PDF — malware analysis report

Static analysis result for SHA-256 96219dac52260490…

MALICIOUS

PDF

58.0 KB Created: 2020-08-02 20:40:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6ca9d8eabd4a9cc9846f3c3e1deae19 SHA-1: 006684ee3eea2c212f2e8b61c1e33781ce35f1b0 SHA-256: 96219dac5226049001a50acb69c0b57f4d4fabc6a06262f270baf19b530f997e
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, indicative of SEO spam or a link farm. The ML classifier also strongly indicated maliciousness. The document body contains the URL https://ttraff.ru/pify?keyword=center+text+markdown, which is a known malicious redirector, and numerous other links hosted on cdn.shopify.com and other domains, likely serving as a link farm. No scripts were extracted from this sample.

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=center+text+markdown
    • http://files.picturepenphoto.com/uploads/1/3/1/4/131408899/845372.pdf
    • http://files.teensfaithcabot.org/uploads/1/3/1/4/131438113/puzufatog.pdf
    • http://files.coppercanyoncinches.com/uploads/1/3/0/7/130739309/nakebagojam.pdf
    • https://cdn.shopify.com/s/files/1/0432/1270/1854/files/fitewodulewurewamepoz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bararilisubolubudikolumo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8891/2290/files/penanesugebepuleter.pdf
    • https://cdn.shopify.com/s/files/1/0433/6985/7176/files/kalidimaluvutos.pdf
    • https://cdn.shopify.com/s/files/1/0430/2811/9706/files/lesegadisefuxiru.pdf
    • https://cdn.shopify.com/s/files/1/0435/7177/3601/files/44974875884.pdf
    • https://cdn.shopify.com/s/files/1/0438/4541/9165/files/pejubunaxosi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9507/2674/files/javascript_switch_statement.pdf
    • https://cdn.shopify.com/s/files/1/0430/9896/4117/files/58982318688.pdf
    • https://cdn.shopify.com/s/files/1/0431/6132/1621/files/ffxiv_act_setup.pdf
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/taekwondo_training_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/7795/0870/files/49686131640.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/6219719719.pdf
    • https://cdn.shopify.com/s/files/1/0433/8135/8759/files/git_how_do_host_website.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000079ea.bin
6fd17310270aeac38019c2fb202d6c968baeef6a0fbf6db964ca9a87548b9838		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79EA 4892 bytes
font_01_sfnt_off00008a7e.bin
64dc8fc5d82f8124bee96b54d9c2409d08ec346abe0875115db0a4d81423d47c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A7E 1624 bytes
font_02_sfnt_off000092c4.bin
86efb605ef4745d5b07e8d9aed4de6ad8f50e23042e65befc3f31184618f042b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92C4 15776 bytes
font_03_sfnt_off0000c461.bin
1b44218257806f750c7fedc2cca84b6b30ff477c2da870f9e14c0541087d9c9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC461 16544 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.