Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8388ef4c0b726ea…

MALICIOUS

PDF

37.5 KB Created: 2020-08-01 06:55:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1236fb89dc27f9a3eb08be488576f744 SHA-1: 6969c2811db74b845a88a32775e4f4eea1141cbe SHA-256: e8388ef4c0b726eac5531df14e2d8318d1faa17eb37a605fb447ea5cad8a26ec
152 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with the primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a '2004 jetta owners manual pdf' and the malicious URL, suggesting a lure to trick users into downloading further malicious content. 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=2004+jetta+owners+manual+pdf
    • http://files.rebeccasnutfree.com/uploads/1/3/0/8/130874030/663f7110032.pdf
    • http://files.c-x.com/uploads/1/3/1/4/131454221/dibawabewixefu-getadudo-manow.pdf
    • http://files.ncpimaging.com/uploads/1/3/1/4/131452938/jugojoxisuvunene.pdf
    • http://files.utahfccla.org/uploads/1/3/1/1/131163932/428aad3a3e2d7f8.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13977314479.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32852202686.pdf
    • https://cdn.shopify.com/s/files/1/0435/4962/2431/files/loluz.pdf
    • https://cdn.shopify.com/s/files/1/0431/7931/1253/files/97833759919.pdf
    • https://cdn.shopify.com/s/files/1/0431/4615/0039/files/rebulajisozosijavakevebe.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/mirifom.pdf
    • https://cdn.shopify.com/s/files/1/0428/0510/0707/files/53754075252.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/nusupisizo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1548/7133/files/wemetusususiwokevowosu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4647/6708/files/alicia_keys_karma.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46283819311.pdf
    • https://cdn.shopify.com/s/files/1/0429/3555/0118/files/12740293655.pdf
    • https://cdn.shopify.com/s/files/1/0427/8134/3900/files/vowoporevi.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_off0000532d.bin
23de3d21931e45303b7ca9664fb89ac6f751be61a43ee285cb702b21492c2652
pdf-font-stream PDF embedded font (sfnt) at offset 0x532D 5624 bytes
font_01_sfnt_off00006651.bin
ecb7bd921a220a58015420d2c4ef179227457fef49383ce27137182bf05b4afe
pdf-font-stream PDF embedded font (sfnt) at offset 0x6651 10200 bytes