Malicious PDF — malware analysis report

Static analysis result for SHA-256 48745c6d4b7d6a9e…

MALICIOUS

PDF

40.8 KB Created: 2020-08-10 14:18:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6ca7a743289f11092db539e9c7752da SHA-1: 033e527398b3eb5b5665c5765ff263260e8fc1c8 SHA-256: 48745c6d4b7d6a9ed034f643c1062e4196acf006c0dc8b771505f3e7f9cd18b2
152 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. Additionally, it contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but includes the malicious URL, reinforcing the attack pattern.

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=bearing+types+and+names+pdf
    • http://files.estherarenasarroyo.com/uploads/1/3/1/1/131164202/9682221.pdf
    • http://files.wembleylodge.com/uploads/1/3/1/3/131379530/vezati.pdf
    • http://files.quillskywritings.com/uploads/1/3/1/1/131164386/846652.pdf
    • http://fipanag.ronaldwallach.com/uploads/1/3/2/6/132695829/17ad7f03.pdf
    • http://jitig.hirethespires.com/uploads/1/3/2/6/132683071/bumujozevuxej.pdf
    • https://cdn.shopify.com/s/files/1/0433/7503/4520/files/bogowie_musz_by_szaleni.pdf
    • https://cdn.shopify.com/s/files/1/0437/1021/8391/files/33456123656.pdf
    • https://cdn.shopify.com/s/files/1/0430/7186/4993/files/wigozofanorenidagizom.pdf
    • https://cdn.shopify.com/s/files/1/0430/9814/4932/files/39356221103.pdf
    • https://cdn.shopify.com/s/files/1/0429/5265/5002/files/19354303614.pdf
    • https://cdn.shopify.com/s/files/1/0428/7922/1927/files/62074834564.pdf
    • https://cdn.shopify.com/s/files/1/0429/3849/9235/files/35386895806.pdf
    • https://cdn.shopify.com/s/files/1/0429/9728/5027/files/68032385804.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72163988246.pdf
    • https://cdn.shopify.com/s/files/1/0430/5338/3833/files/50933585423.pdf
    • https://cdn.shopify.com/s/files/1/0432/1761/7057/files/vigegukedumarirof.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_off000062dd.bin
0fa3b4d8cd30dfa3bf168ff5f72b30e614e2178595b01e0217fba39b776d9b47
pdf-font-stream PDF embedded font (sfnt) at offset 0x62DD 5480 bytes
font_01_sfnt_off00007571.bin
1bb53932068cd405ea725cd33642416bf3b81b9583b4c80a98f48ddb92458368
pdf-font-stream PDF embedded font (sfnt) at offset 0x7571 9636 bytes