Malicious PDF — malware analysis report

Static analysis result for SHA-256 923311f6a53ce447…

MALICIOUS

PDF

42.8 KB Created: 2020-08-14 23:51:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16adc2e509648999e48876a7f2ca9df5 SHA-1: e5c35022ec2d19c4941fc552b5cb9d4952b38b9e SHA-256: 923311f6a53ce4477b7225ec1c86b92a32cacf49cbc98e805f4ab6b3ac9202b5
152 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=dental+product+shopper+buyers+guide'. Additionally, it features a link farm heuristic, indicating a large number of external PDF links, with 'https://cdn.shopify.com/s/files/1/0434/3159/2088/files/26234822528.pdf' being the first listed. The document body, though heavily obfuscated, contains text related to a 'Dental product shopper buyers guide' and the URL 'https://ttraff.cc/pify?keyword=dental+product+shopper+buyers+guide', reinforcing the lure.

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=dental+product+shopper+buyers+guide
    • http://files.joywinsdammit.com/uploads/1/3/0/8/130873807/e5cd1.pdf
    • http://gareruzed.peterstyle.eu/uploads/1/3/2/3/132303027/demupomal.pdf
    • http://files.faceinthesunlight.org/uploads/1/3/0/7/130740193/61073c382c215.pdf
    • https://cdn.shopify.com/s/files/1/0434/3159/2088/files/26234822528.pdf
    • https://cdn.shopify.com/s/files/1/0430/4932/0610/files/53381554965.pdf
    • https://cdn.shopify.com/s/files/1/0432/1371/7662/files/wuwatufajegoweguninu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3718/7493/files/82226505464.pdf
    • https://cdn.shopify.com/s/files/1/0432/2243/3953/files/pavigefekadar.pdf
    • https://cdn.shopify.com/s/files/1/0437/8610/9086/files/3d_shapes_worksheets_grade_2.pdf
    • https://cdn.shopify.com/s/files/1/0428/1332/5471/files/kegexubuperironujag.pdf
    • https://cdn.shopify.com/s/files/1/0428/1712/6556/files/merge_sort_in_c.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sesolofulazige.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_off00006650.bin
6bc3e9f93964fbaba6735c09eb5674ea975dd45628162dfa6f32a1e26180cb89
pdf-font-stream PDF embedded font (sfnt) at offset 0x6650 5576 bytes
font_01_sfnt_off0000793b.bin
d0397752fbb1281dca69ffa4848b142e7ebd9bb40f973485c809bac20af3699b
pdf-font-stream PDF embedded font (sfnt) at offset 0x793B 10832 bytes