Malicious PDF — malware analysis report

Static analysis result for SHA-256 8377f6107b3ce619…

MALICIOUS

PDF

34.7 KB Created: 2020-08-10 09:12:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d48c080e81e2aa764dc81884ec2c4f29 SHA-1: f9c146a5c068eb067cc79504dae56d019261efe7 SHA-256: 8377f6107b3ce619954e50858a780812546557179fcbcd56fc74e944f3c1f840
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to external resources, characteristic of a link farm designed for SEO manipulation or malicious redirection. The primary heuristic firing indicates a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic, suggesting an attempt to lure users to malicious content.

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.ru/pify?keyword=abdullah+saeed+islamic+thought+an+introduction+pdf
    • http://tajuv.drdavidmilanovich.com/uploads/1/3/1/6/131606289/dccfc5.pdf
    • http://files.localumass.com/uploads/1/3/1/4/131454501/866f14b76dbf5.pdf
    • http://files.bckmphnz.com/uploads/1/3/0/7/130775025/senuzupupezage_venojux_popolaz.pdf
    • http://files.blog.millerlab.ca/uploads/1/3/0/9/130969708/7974949.pdf
    • https://cdn.shopify.com/s/files/1/0431/8999/3636/files/70218405892.pdf
    • https://cdn.shopify.com/s/files/1/0432/5041/7827/files/regexenedadonepi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7331/4715/files/14075742644.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8914/files/98199265875.pdf
    • https://cdn.shopify.com/s/files/1/0437/2371/8824/files/zitesowedemiwo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81397135942.pdf
    • https://cdn.shopify.com/s/files/1/0430/0383/8615/files/talking_as_fast_as_i_can_audiobook_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0434/3834/2311/files/seepage_control_in_earth_dams.pdf
    • https://cdn.shopify.com/s/files/1/0437/7542/6722/files/57767848423.pdf
    • https://cdn.shopify.com/s/files/1/0436/9291/6886/files/vetod.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/luvibuxunefipefijuli.pdf
    • https://cdn.shopify.com/s/files/1/0437/7188/7767/files/46814137943.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_off0000482c.bin
b675b0e320273f218dd6ff7fdcd009c51db2f16427d8d9a3485884f94ec80b3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x482C 5700 bytes
font_01_sfnt_off00005b5d.bin
fd1d45adfc7dc2a56cadc8f42ed7452bc09d98f8adce174086ce9b3f5894909c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B5D 9488 bytes