Malicious PDF — malware analysis report

Static analysis result for SHA-256 771849afe220a7e0…

MALICIOUS

PDF

45.8 KB Created: 2020-08-01 21:05:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 365bfce089b386cbe50815bf86fc65d5 SHA-1: bc8cddafb38cb522839909aa16f728a4c17616a8 SHA-256: 771849afe220a7e0a12f32a1919c097c15019e96bbceac1d05c59965946c6839
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of links, many of which point to external PDFs, suggesting a link farm designed to improve search engine rankings for malicious content. One prominent link, disguised as an Amazon app store download, redirects to `https://ttraff.ru/pify?keyword=amazon+app+store+apk`, which is known malicious redirector infrastructure. The document's structure and numerous links indicate a deceptive attempt to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=amazon+app+store+apk
    • http://files.countrysquirewinery.com/uploads/1/3/1/8/131856627/b09c9.pdf
    • http://files.tucsonyouth.org/uploads/1/3/1/6/131606397/poxomijuminenutogop.pdf
    • http://files.fmvolleyball.com/uploads/1/3/1/1/131163898/fefurupulumolazal.pdf
    • http://files.soyouknow.info/uploads/1/3/1/3/131380440/bigozig.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/0263/4148/files/zipuwise.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96704933611.pdf
    • https://cdn.shopify.com/s/files/1/0432/5949/4555/files/18978352516.pdf
    • https://cdn.shopify.com/s/files/1/0432/6152/6166/files/68907125906.pdf
    • https://cdn.shopify.com/s/files/1/0433/9469/5318/files/92307978129.pdf
    • https://cdn.shopify.com/s/files/1/0428/8921/6167/files/45810259624.pdf
    • https://cdn.shopify.com/s/files/1/0432/5271/1582/files/71661630408.pdf
    • https://cdn.shopify.com/s/files/1/0427/4785/5004/files/38235431497.pdf
    • https://cdn.shopify.com/s/files/1/0427/6974/4028/files/valaruminisojuzidaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/6486/0575/files/palajuluwikodex.pdf
    • https://cdn.shopify.com/s/files/1/0430/9942/2881/files/57712471230.pdf
    • https://cdn.shopify.com/s/files/1/0436/2086/0067/files/ramalofosoxog.pdf
    • https://cdn.shopify.com/s/files/1/0439/3913/5643/files/35773573491.pdf
    • https://cdn.shopify.com/s/files/1/0434/0491/8941/files/75182377752.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000687c.bin
5caaa1d6879de8ffb02fe4ff90738109e06152e6506262859a4d1ee14ae3d0ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x687C 4776 bytes
font_01_sfnt_off00007891.bin
b0b1190ddc0ec4a86006dc518f43a20faebeb9b8034ed197cb70acb479e10b4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7891 10596 bytes
font_02_sfnt_off00009c6d.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C6D 4324 bytes

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