Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9630397e2c476f3…

MALICIOUS

PDF

64.4 KB Created: 2020-07-31 19:25:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 361565d4d248a7f3e23a2c089901d52e SHA-1: b282ab55c616845820f650ea009b0d49741bb346 SHA-256: e9630397e2c476f3d306a4810ea8e71379acad0e4da4f75efa0b631efc2dcb8c
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lure users to malicious sites. The document body, though heavily obfuscated, contains the string 'Vbs export to excel' and the malicious URL, suggesting a social engineering attempt to trick users into clicking the link. The ML classifier also strongly indicated maliciousness.

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=vbs+export+to+excel
    • http://files.heartlanddeermanagement.com/uploads/1/3/0/7/130775171/dukilodigezuzom.pdf
    • http://files.dses.ca/uploads/1/3/1/3/131380745/kamisitub.pdf
    • http://files.kaufmancountylawyer.com/uploads/1/3/0/8/130814032/a9598e4abe124dc.pdf
    • https://cdn.shopify.com/s/files/1/0432/4828/7912/files/5872943795.pdf
    • https://cdn.shopify.com/s/files/1/0435/7105/2703/files/larakepodofopiviraridu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0159/3507/files/sikoxub.pdf
    • https://cdn.shopify.com/s/files/1/0427/9628/6111/files/68754454525.pdf
    • https://cdn.shopify.com/s/files/1/0430/3477/1610/files/27735533523.pdf
    • https://cdn.shopify.com/s/files/1/0435/8212/8283/files/vesulujufudedelowemid.pdf
    • https://cdn.shopify.com/s/files/1/0431/7098/8188/files/xiregixomoxe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/35031547028.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/tulon.pdf
    • https://cdn.shopify.com/s/files/1/0430/7058/7029/files/nozexu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3040/4502/files/59298654608.pdf
    • https://cdn.shopify.com/s/files/1/0436/0660/5987/files/kiwewev.pdf
    • https://cdn.shopify.com/s/files/1/0432/3734/3387/files/59586251831.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/3789128943.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_off0000b3df.bin
cc88810024c8e5595fb7ba96bda271735bee7c1d2354f2470cda9783f150ff40
pdf-font-stream PDF embedded font (sfnt) at offset 0xB3DF 4888 bytes
font_01_sfnt_off0000c495.bin
09ec06022fd3b505cb075516a1727d8b2687f90db515d0b0bd6834f449a6803b
pdf-font-stream PDF embedded font (sfnt) at offset 0xC495 15560 bytes