Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e7cf9bb9a620487…

MALICIOUS

PDF

42.7 KB Created: 2020-08-09 22:54:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f3815a49dcdb30c1e17f8b453136ce8 SHA-1: 70f993880fb72617696f6814caaeea93a13f0030 SHA-256: 8e7cf9bb9a620487b058083c9f20a151011eae8e21fb53d9b58984b259e45e96
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of these links, https://ttraff.com/pify?keyword=canaux+ioniques+pdf, is identified as a malicious redirector. This suggests the document's primary purpose is to lure users into clicking these links, potentially leading them to malicious websites or further compromise. 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=canaux+ioniques+pdf
    • http://files.carolnack.net/uploads/1/3/1/3/131383424/acea35.pdf
    • http://files.p352xparentclubhouse.com/uploads/1/3/0/7/130776015/8484645.pdf
    • http://files.maidtoshineservices.net/uploads/1/3/1/4/131437268/29f33e.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3560/files/scert_kerala_textbooks.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zukukujumifuxutage.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72890356131.pdf
    • https://cdn.shopify.com/s/files/1/0430/8104/0033/files/lojujaxitevubegowafo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0342/8510/files/91631427076.pdf
    • https://cdn.shopify.com/s/files/1/0439/0017/4504/files/huffman_coding_example.pdf
    • https://cdn.shopify.com/s/files/1/0440/8714/8709/files/85931522139.pdf
    • https://cdn.shopify.com/s/files/1/0427/4916/5734/files/90946104527.pdf
    • https://cdn.shopify.com/s/files/1/0435/2281/8200/files/34557711675.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80884551140.pdf
    • https://cdn.shopify.com/s/files/1/0433/9659/5868/files/how_do_i_get_terminal_in_windows.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6509/files/87960849119.pdf
    • https://cdn.shopify.com/s/files/1/0434/4581/3413/files/33546561553.pdf
    • https://cdn.shopify.com/s/files/1/0427/8996/1884/files/45559301621.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_off00006639.bin
b836430cfccc3ef0b785154ae53c3b1070982c6cb15fa7960cc19f67f282f9bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x6639 5008 bytes
font_01_sfnt_off0000775a.bin
544a34860d0b201ab0a2eb06fca32a2f020e295ad74629b0ef99f34c957078b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x775A 11588 bytes