Malicious PDF — malware analysis report

Static analysis result for SHA-256 961f9515634339b2…

MALICIOUS

PDF

42.2 KB Created: 2020-08-31 00:13:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1030911d7b55e7f71aaee5d184c3ab74 SHA-1: d9f7ec610fb191b0969cc768d213a574894cb936 SHA-256: 961f9515634339b2b2e6e2dc429ec69847fa751019103f17612f5d7c00dc5538
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wix?keyword=pixel+film+studios+torrent'. This URL is presented in a context that mimics a search result, likely to entice users to click through. The document also features a large number of embedded links, many hosted on Shopify, which is flagged as a link farm. The ML classifier strongly indicates maliciousness.

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=pixel+film+studios+torrent
    • https://cdn.shopify.com/s/files/1/0428/4622/4540/files/fovakagifepafimed.pdf
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/53463143108.pdf
    • https://cdn.shopify.com/s/files/1/0439/0898/9096/files/sefogorazizuwipi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6372/1637/files/the_rise_and_fall_of_adolf_hitler_book.pdf
    • https://static.usrfiles.com/ugd/b8c837_5fc2a3ee46f14e3ba4ec726f7aa63a3e.pdf
    • https://cdn.shopify.com/s/files/1/0433/3463/1579/files/56462359675.pdf
    • https://cdn.shopify.com/s/files/1/0433/5504/6037/files/58826505924.pdf
    • https://cdn.shopify.com/s/files/1/0437/7142/9016/files/56010851458.pdf
    • https://cdn.shopify.com/s/files/1/0434/1330/7541/files/archegoniate_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/2866/7798/files/zofetakokuvopijelugo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/risekumomivedopela.pdf
    • https://cdn.shopify.com/s/files/1/0432/6768/6556/files/agilent_hplc_software.pdf
    • https://cdn.shopify.com/s/files/1/0430/7812/3680/files/golongan_obat_anti_jamur.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_off00005c45.bin
de31e6d66a0e30a6ff762c5d83417d3e245fdde3192896d4053c519915c4679b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C45 4796 bytes
font_01_sfnt_off00006c74.bin
da93589795be88782787f86d3867f737ba4c9cb99d5c3b55def481f2be8b730f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C74 9872 bytes
font_02_sfnt_off00008e52.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E52 4324 bytes