Malicious PDF — malware analysis report

Static analysis result for SHA-256 43ee7fd69f500afb…

MALICIOUS

PDF

52.1 KB Created: 2020-08-31 15:47:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 113faba6c50d749423a649ee1ff138ec SHA-1: 3fd804b9e20eb0389b8e602f03d283ec40fbc8d9 SHA-256: 43ee7fd69f500afb9478d1dd1dd326b20c8729d09ca97c9d227e47f50b1d3ebf
152 Risk Score

Malware Insights

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

The PDF contains a prominent link that, when clicked, redirects to a malicious domain (ttraff.com) with a keyword suggesting a software download. This is further supported by the heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the presence of the malicious URL in the document body. The ML classifier also strongly indicated maliciousness. The document appears to be a lure for users searching for specific software, aiming to redirect them to potentially harmful 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.com/wix?keyword=audacity+for+windows+10+64+bit
    • https://cdn.shopify.com/s/files/1/0432/1715/8312/files/31306396502.pdf
    • https://cdn.shopify.com/s/files/1/0435/9480/9512/files/cambridge_checkpoint_english_workbook_9.pdf
    • https://cdn.shopify.com/s/files/1/0431/4044/8407/files/heat_of_formation_of_cyclohexane.pdf
    • https://cdn.shopify.com/s/files/1/0433/9679/2478/files/44372618170.pdf
    • https://static.usrfiles.com/ugd/d9d1f5_f1007d544fd34b89aead578a03c76830.pdf
    • https://static.usrfiles.com/ugd/b8c837_afef08e525ea48958788c233d9a71a03.pdf
    • https://cdn.shopify.com/s/files/1/0435/9982/3016/files/pobuxorovus.pdf
    • https://cdn.shopify.com/s/files/1/0432/2210/6271/files/mezijut.pdf
    • https://cdn.shopify.com/s/files/1/0436/5756/0217/files/febibonod.pdf
    • https://cdn.shopify.com/s/files/1/0431/0722/1661/files/reproduccion_del_venado.pdf
    • https://cdn.shopify.com/s/files/1/0437/0399/2474/files/shirley_valentine_script.pdf
    • https://cdn.shopify.com/s/files/1/0435/5840/4259/files/few_and_little_exercises_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0434/0819/5735/files/39776527972.pdf
    • https://cdn.shopify.com/s/files/1/0429/7208/6423/files/xawubapiguzoravawo.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_off00008b93.bin
896a1b8e6f03593a0072b254165aa83742957c2622084564be337a19634ec954
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B93 5740 bytes
font_01_sfnt_off00009f4c.bin
551b8871597bed5e9eb688a2de45732442178ecb3537f9d45c82415c5d241c43
pdf-font-stream PDF embedded font (sfnt) at offset 0x9F4C 10532 bytes