Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebed9532fccb8cda…

MALICIOUS

PDF

43.0 KB Created: 2020-08-01 22:43:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c1c170f561d3faade18d4aa1c6f0f2a SHA-1: 7c0a7c2eef410c895daee953af86d917f30e3cc9 SHA-256: ebed9532fccb8cdae5d8082fd243d331b1a85fe07f8f7f312ddf457c9877ff0b
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external links, indicating a link farm. The ML classifier also strongly indicated maliciousness. The primary malicious URL identified is ttraffic.ru, which is likely used to redirect users to further malicious content. The document body contains garbled text but includes the target URL, suggesting a lure related to 'Tascam dr40 manual'. No scripts were extracted, but the PDF structure itself is designed to lead users to malicious 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.ru/pify?keyword=tascam+dr40+manual
    • http://files.bethcaindesigns.com/uploads/1/3/0/8/130814252/2005208.pdf
    • http://files.dentalequipmentonlinestore.com/uploads/1/3/0/9/130969974/depufirad-vakotazaji.pdf
    • http://files.jadabug.com/uploads/1/3/0/7/130739387/8720950.pdf
    • http://files.1divashop.com/uploads/1/3/2/3/132302716/sutibogoji-vuloja-tanuponinun.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pigagijewunafusigiku.pdf
    • https://cdn.shopify.com/s/files/1/0432/6454/0827/files/43365350290.pdf
    • https://cdn.shopify.com/s/files/1/0429/3397/7247/files/16645884487.pdf
    • https://cdn.shopify.com/s/files/1/0434/4777/9478/files/16932553972.pdf
    • https://cdn.shopify.com/s/files/1/0427/8996/1884/files/rikujilowoxupiwadibe.pdf
    • https://cdn.shopify.com/s/files/1/0432/0627/9323/files/vitabegu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1280/8091/files/74115518116.pdf
    • https://cdn.shopify.com/s/files/1/0430/5901/9933/files/fedovatiwetogekuniwute.pdf
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/26928931888.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/72274594547.pdf
    • https://cdn.shopify.com/s/files/1/0428/2174/6847/files/62262504135.pdf
    • https://cdn.shopify.com/s/files/1/0438/2811/7661/files/kufuwawuru.pdf
    • https://cdn.shopify.com/s/files/1/0438/4689/3730/files/21470459297.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_off000069cc.bin
46df006ff38136d283ffce1f4d257039130344d06f91459d0a1eae6d9dce4c52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69CC 5264 bytes
font_01_sfnt_off00007b98.bin
5e51c29d16ea788a1b7a4ce1f0ed314b054bd6e6df2828b25470f1fbf6b001da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B98 10436 bytes

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