Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5308483e84e341f…

MALICIOUS

PDF

52.1 KB Created: 2020-07-29 13:24:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18e2370108693556571624fdfa569d43 SHA-1: 69e9bd373d8339226d51855b496bfa874157923d SHA-256: c5308483e84e341f999f4e1c3fbb3994a53a91aca6caa9b9a076614aac70259e
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a critical heuristic firing for linking to known malicious redirector infrastructure. Additionally, another critical heuristic identified it as a PDF link farm, with numerous embedded URLs pointing to various domains, including multiple Shopify subdomains. The primary malicious URL identified is ttraff.ru, which is used in conjunction with a keyword suggesting a lure for Android development tutorials.

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=android+development+tutorial+for+beginners+in+tamil+pdf
    • http://files.kcrkradio.com/uploads/1/3/1/3/131398338/9c0bc2.pdf
    • http://files.pacengtech.com/uploads/1/3/0/7/130740483/3d87ca.pdf
    • http://files.hansogrenphotography.com/uploads/1/3/0/8/130874295/lipopavotidawese.pdf
    • https://cdn.shopify.com/s/files/1/0432/3095/3627/files/27149036335.pdf
    • https://cdn.shopify.com/s/files/1/0430/6678/5949/files/siwuwufikekik.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5093/files/8076448583.pdf
    • https://cdn.shopify.com/s/files/1/0432/7263/4533/files/gotoritogixulog.pdf
    • https://cdn.shopify.com/s/files/1/0431/3546/7682/files/38122115610.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9395/files/gapaloripuvidiferodutiva.pdf
    • https://cdn.shopify.com/s/files/1/0431/3884/2779/files/17230510256.pdf
    • https://cdn.shopify.com/s/files/1/0435/5181/7879/files/71480706870.pdf
    • https://cdn.shopify.com/s/files/1/0432/8800/2710/files/vuzesetis.pdf
    • https://cdn.shopify.com/s/files/1/0433/3754/7929/files/kivegujeniw.pdf
    • https://cdn.shopify.com/s/files/1/0431/1983/7346/files/31157339784.pdf
    • https://cdn.shopify.com/s/files/1/0428/1391/5303/files/jametanojibapulizotana.pdf
    • https://cdn.shopify.com/s/files/1/0433/5812/6245/files/lulewed.pdf
    • https://cdn.shopify.com/s/files/1/0430/7543/6705/files/lekonol.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_off00008b2a.bin
941309a74c440c058cece3a9902cffa3c1b35ebcee3168a5067ad052cfc8495b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B2A 5432 bytes
font_01_sfnt_off00009d84.bin
24c1a8115db5270a14fb24702ccb8df3fe527a350b5d9024768609a920dfbe91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D84 10744 bytes

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