Malicious PDF — malware analysis report

Static analysis result for SHA-256 7df30ad7838e44d6…

MALICIOUS

PDF

47.5 KB Created: 2020-09-01 23:12:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15b34d7814abb144416eb7f8edac83eb SHA-1: 01ceba6b68c15bac24ddebcd59ebf3bc4b048b8c SHA-256: 7df30ad7838e44d6ff67242873fcb8eae6e97e80956f7b57fe901d1aee13da5e
152 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to its inclusion of a link farm pointing to known malicious redirector infrastructure. The primary malicious URL is https://ttraff.com/wix?keyword=google+chrome++for+android+version+2.+2, which is designed to lure users. The document body, though heavily obfuscated, contains references to this URL and other benign-looking PDF links hosted on Shopify, suggesting a tactic to disguise malicious intent within a large number of seemingly legitimate links.

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/wix?keyword=google+chrome++for+android+version+2.+2
    • https://cdn.shopify.com/s/files/1/0432/3295/2477/files/91672409353.pdf
    • https://cdn.shopify.com/s/files/1/0430/0357/6481/files/pamemadesiniwupisore.pdf
    • https://cdn.shopify.com/s/files/1/0435/7256/0033/files/32927781549.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8914/files/47912652224.pdf
    • https://static.usrfiles.com/ugd/bf0735_f2bcc977fbf84745a956f0c5aefaf80c.pdf
    • https://static.usrfiles.com/ugd/b8c837_50ee4684e01842bd83f915bbc222b7f4.pdf
    • https://static.usrfiles.com/ugd/7d1dc9_05ea4e4214604c1a8bd4fca2f7026714.pdf
    • https://cdn.shopify.com/s/files/1/0431/2832/4257/files/89774280460.pdf
    • https://cdn.shopify.com/s/files/1/0433/9341/7366/files/potuko.pdf
    • https://cdn.shopify.com/s/files/1/0431/7986/8309/files/pawavijelufiwejafi.pdf
    • https://cdn.shopify.com/s/files/1/0434/1160/3612/files/angular_4_tutorial_point_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/4563/3699/files/subject_verb_agreement_worksheet_with_answers.pdf
    • https://static.usrfiles.com/ugd/b8c837_30133338fe614a2a8091094c329c4363.pdf
    • https://static.usrfiles.com/ugd/c33f71_b6ec2267fda44c99b75b8a2231fffc4e.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d29.bin
839fd420cddbc30b77ab719ed7d644395acd55b3e6ab7809823057cede683c6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D29 5400 bytes
font_01_sfnt_off00007f63.bin
1a163dcb820307b0c3310a9d95ff24bd40fe31128a49e47b6ef8250fa1c508ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F63 10260 bytes
font_02_sfnt_off0000a279.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA279 4324 bytes

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