Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eee3fed4941260e…

MALICIOUS

PDF

35.7 KB Created: 2020-08-19 23:04:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9e731572ec820b5faba791701624934 SHA-1: d237bf6314aaea97a9caf9533ccd535899418c05 SHA-256: 1eee3fed4941260ec259e75701a355646d5d71173ef3996bb0c96f0da5744236
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=give+formal+stamp+of+approval+crossword+clue'. This URL is presented within the document body, suggesting a lure to trick the user into clicking. The PDF also exhibits characteristics of a link farm, with numerous embedded links, many of which point to Shopify domains hosting other PDFs. While some Shopify links are benign, the presence of the malicious redirector and other unknown URLs indicates a malicious intent to drive traffic to potentially harmful sites. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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=give+formal+stamp+of+approval+crossword+clue
    • http://tixewe.petermurraylondon.com/uploads/1/3/0/8/130874285/fakepuwosit-jedowiloso.pdf
    • http://files.joanne-wang.com/uploads/1/3/0/7/130739510/5541541.pdf
    • https://cdn.shopify.com/s/files/1/0431/0636/9703/files/medicinal_uses_of_aloe_vera.pdf
    • https://cdn.shopify.com/s/files/1/0429/1503/7351/files/43012692774.pdf
    • https://cdn.shopify.com/s/files/1/0439/0577/7832/files/bagalujibipira.pdf
    • https://cdn.shopify.com/s/files/1/0433/1061/2644/files/7943516246.pdf
    • https://cdn.shopify.com/s/files/1/0437/6041/8970/files/17419673367.pdf
    • https://cdn.shopify.com/s/files/1/0428/1332/5471/files/advantages_and_disadvantages_of_nuclear_and_extended_family.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/43778875991.pdf
    • https://cdn.shopify.com/s/files/1/0435/8062/0963/files/jawapawuvogilaxuge.pdf
    • https://cdn.shopify.com/s/files/1/0444/2944/3238/files/matlab_gaussian_function.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_off00004b68.bin
8ede95fa27af1920737816a0655b1c92a6d78c8b650bcf2dc0560375c8a3c9a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B68 5484 bytes
font_01_sfnt_off00005e0c.bin
53270a290b880a62e2b31fd5ea7113f8152073fa6b53c11e228a2bac73c4436d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E0C 10624 bytes