Malicious PDF — malware analysis report

Static analysis result for SHA-256 58c26188da7a8b7c…

MALICIOUS

PDF

41.8 KB Created: 2020-08-02 16:04:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3202583f448e777f7937232a05921f0d SHA-1: dd1f825e84be4b6ba343a7ccf7b0893ef9436e96 SHA-256: 58c26188da7a8b7cfd9cb4080ab5445acf83ecec57d55b0c80629c869984d136
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects to known malicious infrastructure at ttraff.cc. The document body, though heavily obfuscated, contains the text 'Xbox one controller bluetooth' and the malicious URL, suggesting a lure to trick users into clicking the link. 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.cc/pify?keyword=xbox+one+controller+bluetooth
    • http://files.ausneaks.com/uploads/1/3/0/7/130738619/417303.pdf
    • http://files.bevpurduefineart.com/uploads/1/3/1/4/131453253/4135604.pdf
    • http://files.expressivelanguagecenter.com/uploads/1/3/0/7/130775516/mufezadofizegazas.pdf
    • http://files.mytoepro.com.au/uploads/1/3/1/4/131406478/12ac3ab9.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuxovozukirofavekejob.pdf
    • https://cdn.shopify.com/s/files/1/0434/5793/7561/files/bisufusu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8375/1831/files/50921429448.pdf
    • https://cdn.shopify.com/s/files/1/0432/6404/9318/files/zorerudopovabukaguxetep.pdf
    • https://cdn.shopify.com/s/files/1/0429/7608/4117/files/gupezolinupesotebew.pdf
    • https://cdn.shopify.com/s/files/1/0429/7061/1861/files/77974835347.pdf
    • https://cdn.shopify.com/s/files/1/0432/9101/7374/files/66991548378.pdf
    • https://cdn.shopify.com/s/files/1/0428/9635/9580/files/46278335961.pdf
    • https://cdn.shopify.com/s/files/1/0427/9966/1223/files/lab_technician_cover_letter.pdf
    • https://cdn.shopify.com/s/files/1/0432/4920/5405/files/72318638411.pdf
    • https://cdn.shopify.com/s/files/1/0427/4136/6951/files/37521241582.pdf
    • https://cdn.shopify.com/s/files/1/0429/3754/8959/files/garobubamurotexizata.pdf
    • https://cdn.shopify.com/s/files/1/0428/5353/1807/files/84218120910.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_off0000680f.bin
2933a07e73465cd802a148d25e47e9a754848a65810be9e8c5dd47d99f7496d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x680F 4684 bytes
font_01_sfnt_off000077f7.bin
df8655ceb100dfb7a97e9a497836fcadc43489cacba9e56cc339124a38ee5541
pdf-font-stream PDF embedded font (sfnt) at offset 0x77F7 10048 bytes