Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a24e1910f12d6b1…

MALICIOUS

PDF

40.7 KB Created: 2020-08-25 04:11:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30ba1c4b83ff912e5817dd1e5926d8da SHA-1: d982c7ec18bb14ee15e3c73c67a1505019565f90 SHA-256: 3a24e1910f12d6b11ba8946c31ef965763c3752ca15088d6adf256cb52cb728f
152 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for redirecting users to malicious sites. Specifically, it links to a redirector at 'ttraff.cc' which is associated with malicious activity. The document body, though heavily obfuscated, contains references to the Anker Powercore user guide and the malicious URL, suggesting a lure to trick users into clicking. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm designed to improve SEO for 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.cc/pify?keyword=anker+powercore+10000+user+guide
    • http://zimipi.themaguiretwins.com/uploads/1/3/1/4/131409090/gidupubuj.pdf
    • http://napovuzin.magicalforestcreations.co.uk/uploads/1/3/0/8/130873826/bivotoviz_kuxodito.pdf
    • https://cdn.shopify.com/s/files/1/0429/3374/7878/files/xadedixikodovaxe.pdf
    • https://cdn.shopify.com/s/files/1/0434/8064/5782/files/bojigunawazetuloxalemilux.pdf
    • https://cdn.shopify.com/s/files/1/0433/8604/4570/files/57716873518.pdf
    • https://cdn.shopify.com/s/files/1/0429/4426/6399/files/tavama.pdf
    • https://cdn.shopify.com/s/files/1/0437/6998/7223/files/90271787926.pdf
    • https://cdn.shopify.com/s/files/1/0431/6053/5196/files/arihant_books_free_download_class_10_maths.pdf
    • https://cdn.shopify.com/s/files/1/0434/0059/3557/files/38399806727.pdf
    • https://cdn.shopify.com/s/files/1/0431/1344/7584/files/absolute_value_of_a_complex_number_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/6495/0946/files/wimaka.pdf
    • https://cdn.shopify.com/s/files/1/0429/8987/9445/files/dadilulopibisafoxid.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_off000060ca.bin
230e3da2316cb6065176109b6ac238c3099187ff6c21c9059038035667805a0f
pdf-font-stream PDF embedded font (sfnt) at offset 0x60CA 5340 bytes
font_01_sfnt_off0000731c.bin
60679e331d72f91c8c6065e98f95bd2630166941d3286abc5f07f79e6183c204
pdf-font-stream PDF embedded font (sfnt) at offset 0x731C 10260 bytes