Malicious PDF — malware analysis report

Static analysis result for SHA-256 223ce81f9ae502a8…

MALICIOUS

PDF

33.7 KB Created: 2020-08-15 01:34:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2dbea0b906efd06ef7013a76cbe118f3 SHA-1: e7950cb9ea030802bcbd80ce457f50e6c9604d27 SHA-256: 223ce81f9ae502a844407de2a482fb476a837709849907d1ddb29d5f55ccec0d
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lure users into downloading potentially malicious files. The document body, though heavily obfuscated, contains text related to a 'Konica minolta bizhub 206 scanner driver' and the malicious URL, suggesting a social engineering pretext for the download. The presence of a large number of external PDF links, many pointing to Shopify, further indicates a link farm designed for SEO manipulation to attract victims.

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=konica+minolta+bizhub+206+scanner+driver
    • http://files.libertytactical.solutions/uploads/1/3/0/7/130776111/tajimuzadazisamulop.pdf
    • http://jesofed.catmeyers.com/uploads/1/3/1/3/131380600/ba7f91ff.pdf
    • https://cdn.shopify.com/s/files/1/0433/4449/4750/files/gujej.pdf
    • https://cdn.shopify.com/s/files/1/0432/2541/5843/files/1_hunnid_k_camp_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/0188/7396/files/rewokanujuwuleno.pdf
    • https://cdn.shopify.com/s/files/1/0431/8547/1656/files/tapetibejavobopa.pdf
    • https://cdn.shopify.com/s/files/1/0431/0266/6906/files/zagiwawovixawi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8154/7424/files/zodebexijiwaduvodimo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0450/9853/files/13041546168.pdf
    • https://cdn.shopify.com/s/files/1/0436/9252/3675/files/anexo_6_oaci.pdf
    • https://cdn.shopify.com/s/files/1/0430/7845/1351/files/bejatategedituluvanawime.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_off000044e1.bin
3a7a85ef73491248c36c406bb001cc067799630d283c7caacc3fce3836b35188
pdf-font-stream PDF embedded font (sfnt) at offset 0x44E1 5828 bytes
font_01_sfnt_off0000588b.bin
f7c01bd72da345cf697a2bd850f4f97689e39e4a733b2149c08897a6088a2543
pdf-font-stream PDF embedded font (sfnt) at offset 0x588B 9788 bytes