Malicious PDF — malware analysis report

Static analysis result for SHA-256 7353c83d7dee15cf…

MALICIOUS

PDF

43.0 KB Created: 2020-08-20 14:13:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d64d856a8b1984f0f8dc228d83f79dfc SHA-1: b5294cd1878b70286ee0936421421c4801b0ff99 SHA-256: 7353c83d7dee15cf42e0abae8dbfc4a6c5daffd390bb3cfae793b059451e7037
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service designed to obscure the final destination. The primary malicious link, 'https://ttraff.com/pify?keyword=devexpress+gridview+export+to+excel+template', suggests a lure related to software development or data export. The ML classifier strongly indicated maliciousness, and the presence of a link farm further supports a malicious intent to drive traffic to potentially harmful sites.

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.com/pify?keyword=devexpress+gridview+export+to+excel+template
    • http://files.simonbradfieldphotography.com/uploads/1/3/0/7/130740118/2089600.pdf
    • http://files.potluckfoundation.com/uploads/1/3/1/3/131398145/2396f789.pdf
    • http://files.performingartsworkshops.org/uploads/1/3/0/9/130969045/pelusemogu_xikiku.pdf
    • http://files.workwithflair.com/uploads/1/3/0/8/130874258/3505481.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/9488/4000/files/59996666825.pdf
    • https://cdn.shopify.com/s/files/1/0433/6123/9192/files/assessing_listening_comprehension.pdf
    • https://cdn.shopify.com/s/files/1/0433/5930/5880/files/rumonabov.pdf
    • https://cdn.shopify.com/s/files/1/0431/0922/0501/files/72974278063.pdf
    • https://cdn.shopify.com/s/files/1/0429/5963/4591/files/dodiwimixevewuxusaw.pdf
    • https://cdn.shopify.com/s/files/1/0429/2821/0086/files/rudram_mahanyasam_sanskrit.pdf
    • https://cdn.shopify.com/s/files/1/0434/0318/2243/files/lisitenasofezixiridorif.pdf
    • https://cdn.shopify.com/s/files/1/0432/0044/6626/files/kagel.pdf
    • https://cdn.shopify.com/s/files/1/0435/7645/9422/files/9215540290.pdf
    • https://cdn.shopify.com/s/files/1/0430/6337/8081/files/lidopalivexiradogod.pdf
    • https://cdn.shopify.com/s/files/1/0436/8026/8438/files/xozomukawup.pdf
    • https://cdn.shopify.com/s/files/1/0430/0305/2191/files/xeravigigawugaluxex.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068b4.bin
31391238000b58965c150e7085feb363e427035afd1cd3fd4897d90bebb80cde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68B4 5612 bytes
font_01_sfnt_off00007bcd.bin
0b272918421c660e2bb0de678be0110ca61b8a2e628341157b09e4bf30c854a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BCD 10228 bytes

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