Malicious PDF — malware analysis report

Static analysis result for SHA-256 3786deaebfc47a1e…

MALICIOUS

PDF

34.4 KB Created: 2020-08-17 02:26:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 347ead819c9355170d006cc4ddde49e6 SHA-1: 0f7d1940777a6a97d7be688e8b0e3b18e74f1490 SHA-256: 3786deaebfc47a1e4a49aaa10eaef2c2457e85c1012318332db222e93a1cc895
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector infrastructure at `https://ttraff.cc/pify?keyword=anjaana+anjaani+movie++480p+bolly4u`. The document body text also contains this same URL, indicating the primary lure is to trick users into downloading potentially malicious content disguised as a movie file.

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=anjaana+anjaani+movie++480p+bolly4u
    • http://files.chemistryverse.com/uploads/1/3/1/4/131407227/zenoluwosoz-xexasi-zebip-joxebiw.pdf
    • http://files.navesinkpta.com/uploads/1/3/1/3/131383826/burilur.pdf
    • https://cdn.shopify.com/s/files/1/0438/5865/7430/files/30173465431.pdf
    • https://cdn.shopify.com/s/files/1/0446/9299/6252/files/filipino_abakada.pdf
    • https://cdn.shopify.com/s/files/1/0429/4869/0076/files/kidufuvumikiro.pdf
    • https://cdn.shopify.com/s/files/1/0429/8558/6849/files/26199160999.pdf
    • https://cdn.shopify.com/s/files/1/0431/3910/4930/files/riferipose.pdf
    • https://cdn.shopify.com/s/files/1/0435/6525/2771/files/76679836503.pdf
    • https://cdn.shopify.com/s/files/1/0438/9673/3864/files/19531526753.pdf
    • https://cdn.shopify.com/s/files/1/0428/2292/6492/files/tuwarelifubifepeneleromow.pdf
    • https://cdn.shopify.com/s/files/1/0430/4742/0066/files/vupixumamonimedever.pdf
    • https://cdn.shopify.com/s/files/1/0435/1852/5599/files/mla_format_website_citation_multiple_authors.pdf
    • https://cdn.shopify.com/s/files/1/0433/6844/8152/files/kidudukafofadimoli.pdf
    • https://cdn.shopify.com/s/files/1/0433/0645/1094/files/8951662588.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_off000047e6.bin
5061d1bcd20100c88c29a428abcef64d8789decd51a4c1a8bbaed9b4e5fbba05
pdf-font-stream PDF embedded font (sfnt) at offset 0x47E6 5480 bytes
font_01_sfnt_off00005a93.bin
649b474f311fd3dd50298b31899d79745b5d1a5f5a73ec487c071718da3db563
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A93 10092 bytes