Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb4db43702259bab…

MALICIOUS

PDF

56.2 KB Created: 2020-08-10 08:39:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da5b901b9af416a87d39cfe32a0e1268 SHA-1: d61f101941031529d321fec5a6a8cdf96aa6d565 SHA-256: fb4db43702259bab52fa1a7ea7c7ced5af612120b7011f34da761ca86d73e23c
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Another critical heuristic indicates a PDF link farm, suggesting SEO manipulation to distribute malicious content. The document body, though heavily obfuscated, contains the same lure text as the malicious URL, indicating an attempt to trick users into downloading further malware. 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.com/pify?keyword=brittani+louise+taylor+book+pdf+free+download
    • http://rizog.4thdvpanecs.com/uploads/1/3/1/4/131437736/bdf0e867740d.pdf
    • http://files.xclusivelashesllc.com/uploads/1/3/2/6/132682542/kosefalen-mugal.pdf
    • http://jakujuwu.thepollardgallery.com/uploads/1/3/1/0/131070581/2083165.pdf
    • https://cdn.shopify.com/s/files/1/0434/0996/5212/files/21519824484.pdf
    • https://cdn.shopify.com/s/files/1/0432/9422/8630/files/7158053499.pdf
    • https://cdn.shopify.com/s/files/1/0428/6555/7671/files/ansys_discovery_aim_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0437/6294/2101/files/food_analytical_methods.pdf
    • https://cdn.shopify.com/s/files/1/0434/2641/4748/files/26919352476.pdf
    • https://cdn.shopify.com/s/files/1/0429/4869/0076/files/81716212719.pdf
    • https://cdn.shopify.com/s/files/1/0435/1095/6196/files/58338856934.pdf
    • https://cdn.shopify.com/s/files/1/0433/1290/6405/files/95629216416.pdf
    • https://cdn.shopify.com/s/files/1/0432/8289/0912/files/57477586196.pdf
    • https://cdn.shopify.com/s/files/1/0433/7840/9639/files/betesetugoveximubifibodod.pdf
    • https://cdn.shopify.com/s/files/1/0431/9074/7295/files/zunesoral.pdf
    • https://cdn.shopify.com/s/files/1/0434/6016/5797/files/83927524402.pdf
    • https://cdn.shopify.com/s/files/1/0432/9291/7924/files/66830283570.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_off00009c1f.bin
c04cf96b8b07cabb55f8ad505dd6d30eff7a3e3675fc52fc51b42c607c7ea1e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x9C1F 5480 bytes
font_01_sfnt_off0000aee6.bin
0ca1c796e137b554b8a79dee239c1c156f10b906728565021438b9d7c13c75db
pdf-font-stream PDF embedded font (sfnt) at offset 0xAEE6 10720 bytes