Malicious PDF — malware analysis report

Static analysis result for SHA-256 98239c5a6bf84503…

MALICIOUS

PDF

37.1 KB Created: 2020-08-06 06:42:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a8728f37e42bea16b4a0dee68c2d06f SHA-1: 1b08288ffd31c78731e1f8d2354247bb539ad0b1 SHA-256: 98239c5a6bf84503a361976582bad1383853c8f6cfd55bd8a2e297e1fa5af6eb
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to ttraff.com, which is flagged as malicious. It also features a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly indicated maliciousness. The document body contains the malicious URL, indicating a lure to a potentially harmful site.

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=astm+e8+e8m+13a+pdf
    • http://xegux.projectindianbeauty.com/uploads/1/3/2/7/132712207/doputumenix_sunupam_kamuje.pdf
    • http://files.vsportsapparel.com/uploads/1/3/0/7/130776509/vovorekepiboxex-jogamunovikoxa-mesamariger.pdf
    • http://sodefitev.platinumlineinc.com/uploads/1/3/1/4/131453177/4172383.pdf
    • http://tujix.santacasafertilitycare.com/uploads/1/3/0/8/130814328/0c4b47a622ff6.pdf
    • https://cdn.shopify.com/s/files/1/0430/5561/2057/files/fagexulekatutufuwevivimuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/6341/8784/files/72796387656.pdf
    • https://cdn.shopify.com/s/files/1/0431/2953/6668/files/lesonemavunetofowuge.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2125/files/trading_and_technical_analysis_course_mandar_jamsandekar.pdf
    • https://cdn.shopify.com/s/files/1/0437/0730/2037/files/never_winter_nights_2_walkthrough.pdf
    • https://cdn.shopify.com/s/files/1/0431/0004/5465/files/cadena_de_valor_bimbo.pdf
    • https://cdn.shopify.com/s/files/1/0438/8470/7992/files/negiwew.pdf
    • https://cdn.shopify.com/s/files/1/0432/3108/4708/files/89083118822.pdf
    • https://cdn.shopify.com/s/files/1/0427/7580/6119/files/finuroduwomewefukus.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/poburuzazanugovobovofika.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_off00005463.bin
fcac6dbd1d15c1bbd7f5134c5afa1a56536807411347ae66413bf66defc263d9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5463 5456 bytes
font_01_sfnt_off000066e9.bin
ae4e8143f0bb9db65c33aefceedba08a0ee3e32d9d52afcb6b41dbb0593e5915
pdf-font-stream PDF embedded font (sfnt) at offset 0x66E9 9712 bytes