Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec2c7e64d6c550b4…

MALICIOUS

PDF

42.9 KB Created: 2020-08-09 18:13:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2639c9306dfded8041655b68ba826b0e SHA-1: b011dd9dd330bf810a61d68858aa1d8fe1b67ba3 SHA-256: ec2c7e64d6c550b49f3120f06c6d54445a8ec261f81852025de5e1c6eff01cc4
154 Risk Score

Malware Insights

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

The PDF file contains a high number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body contains obfuscated text and URLs, suggesting an attempt to lure the user into clicking malicious links. No scripts were extracted from this sample.

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=visit+an+apiculture+centre+and+gather+information+about+it+pdf
    • http://files.bhgs.org.uk/uploads/1/3/0/8/130814229/3331135.pdf
    • http://fuvefugi.handsbyhairitage.co/uploads/1/3/0/7/130775732/4411500.pdf
    • http://mazazi.pilgrimsailing.com.au/uploads/1/3/1/4/131453416/tutef_dujavimubagidas.pdf
    • http://files.dmd3d.com/uploads/1/3/0/9/130969939/dupisot-musipixufufel-vopesa.pdf
    • https://cdn.shopify.com/s/files/1/0438/8149/6744/files/vuzugeletabanewudedoju.pdf
    • https://cdn.shopify.com/s/files/1/0436/3105/0905/files/af_1206.pdf
    • https://cdn.shopify.com/s/files/1/0435/7039/7339/files/92696397139.pdf
    • https://cdn.shopify.com/s/files/1/0432/8819/9328/files/zukugokavagasuvejukaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/7405/1491/files/segexepirozatinojanus.pdf
    • https://cdn.shopify.com/s/files/1/0429/5183/5801/files/44387839229.pdf
    • https://cdn.shopify.com/s/files/1/0431/1610/1798/files/advantages_and_disadvantages_of_tourism_in_kerala.pdf
    • https://cdn.shopify.com/s/files/1/0430/3880/2073/files/98590434153.pdf
    • https://cdn.shopify.com/s/files/1/0432/5667/6507/files/95937930066.pdf
    • https://cdn.shopify.com/s/files/1/0429/7503/5541/files/dobexuve.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/44195823049.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/38003135144.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_off0000681d.bin
a41106b79471dce7124f4e6deaf1400ddde0998a6618dd1125c0c09ddba166aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x681D 5676 bytes
font_01_sfnt_off00007b3b.bin
69fef5e8e58c2fd35c5e11706640efefce12d62fa0b5f5ee90fb90573fcf3eab
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B3B 10288 bytes