Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7d7e6d84673d1f7…

MALICIOUS

PDF

45.4 KB Created: 2020-08-12 03:02:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22bb318d0725442fc22342b8ef3428dc SHA-1: 28c47a16b0a58ffc275cc77ab07f440b035609e9 SHA-256: b7d7e6d84673d1f7773e26020b727ec019eea11b6484d524226829bff1533fc9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.cc) that is known to host malicious content. The document body, though heavily obfuscated, contains the same URLs, suggesting a link farm or SEO poisoning tactic to lure victims. The primary malicious URL is https://ttraff.cc/pify?keyword=logical+operators+in+c+programming+with+example+pdf, which likely leads to a further malicious download or phishing page.

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.cc/pify?keyword=logical+operators+in+c+programming+with+example+pdf
    • http://files.vwpitstop.com/uploads/1/3/1/3/131380495/8659607.pdf
    • http://files.adultedresources.com/uploads/1/3/0/7/130740571/bazowawiwumi-gofasev.pdf
    • http://files.housesandcondosph.com/uploads/1/3/1/4/131452949/sasowowulu.pdf
    • http://tejuson.blockchainmena.fintecnet.com/uploads/1/3/2/6/132682787/cbac2ca8af44234.pdf
    • https://cdn.shopify.com/s/files/1/0427/5847/1846/files/28082410878.pdf
    • https://cdn.shopify.com/s/files/1/0432/5844/5979/files/empyrion_auto_miner.pdf
    • https://cdn.shopify.com/s/files/1/0434/8962/4224/files/19562937143.pdf
    • https://cdn.shopify.com/s/files/1/0435/6263/1326/files/mathematical_logic_class_12.pdf
    • https://cdn.shopify.com/s/files/1/0433/3705/6411/files/the_life_of_pablo_album_download_zip.pdf
    • https://cdn.shopify.com/s/files/1/0434/4777/9478/files/jekagoravekovu.pdf
    • https://cdn.shopify.com/s/files/1/0438/3460/5725/files/68686409496.pdf
    • https://cdn.shopify.com/s/files/1/0437/1313/4757/files/litoguwekuxowi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7049/6672/files/luloravuzowi.pdf
    • https://cdn.shopify.com/s/files/1/0440/8901/6472/files/pegepapupomuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/5815/1072/files/90107945422.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/niwaragevutaxesidep.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_off0000676d.bin
b3fb580e4e0f2e96b278f4105425140c3d60ea7287ca9e9cbc215fe17de2e48d
pdf-font-stream PDF embedded font (sfnt) at offset 0x676D 5668 bytes
font_01_sfnt_off00007a9a.bin
a49011b38805796079ef32602b078336b6ac976b649303ff7c284cfcc33e4277
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A9A 14584 bytes