Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1057283346a9f8d…

MALICIOUS

PDF

53.1 KB Created: 2020-07-08 12:00:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22be4b4b271671bb8bfb7feeef816928 SHA-1: 2c09bc47ecba12d295c137d370b8f6285e914c57 SHA-256: f1057283346a9f8d51c78f751e40ae3f46d451adb902835744bdf5c6950a64ba
130 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, including a redirector to 'ttraff.ru', which is flagged as malicious. The document body text, while partially corrupted, includes keywords related to 'up board model paper' and a call-to-action phrase, suggesting a lure to download potentially malicious content. The presence of a large number of external PDF links further indicates a link farm or SEO poisoning tactic, aiming to drive traffic to malicious sites.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/wb?keyword=up%20board%20model%20paper%202019%20class%2010%20pdf%20download%20sanskrit
    • http://files.planninginblackandwhite.com/uploads/1/3/2/7/132710655/bobuzugipiz_renele_litazafurusagop.pdf
    • http://files.belllog.org/uploads/1/3/0/7/130775827/2358242.pdf
    • http://files.ikargb.co.uk/uploads/1/3/1/4/131409170/c416f2d8c877.pdf
    • http://files.orovaleleos.com/uploads/1/3/1/6/131636914/8304814.pdf
    • http://files.northlandfloorlaying.co.nz/uploads/1/3/0/7/130775867/8409356.pdf
    • http://files.dglanded.com/uploads/1/3/0/7/130738758/5105642.pdf
    • http://files.demirandaguitar.com/uploads/1/3/1/8/131871690/fokodibavuf_zogovisum.pdf
    • http://files.alrajabahrain.org/uploads/1/3/1/3/131381722/f167759cfe5c276.pdf
    • http://files.nomadunplugged.com/uploads/1/3/0/7/130776578/tezemoxod.pdf
    • http://files.southernsideshowhootenanny.com/uploads/1/3/0/7/130739690/jemudejo-nusagetusik-paxorawa.pdf
    • https://mekerug368181460.files.wordpress.com/2020/07/vuvuwadopasemaf.pdf
    • https://fojekiv.files.wordpress.com/2020/07/masirulok.pdf
    • https://jezovuri.files.wordpress.com/2020/07/bokopidokol.pdf
    • https://kejaram.files.wordpress.com/2020/06/30725650323.pdf
    • https://lezidonopo.files.wordpress.com/2020/06/21080709859.pdf
    • https://keligimimep15682803.files.wordpress.com/2020/07/gisusuzususexuzu.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_off00007449.bin
3cf82a00ae4059109b2b0f0397ac54e87f43f3714d60cfab72e22335771b34f5
pdf-font-stream PDF embedded font (sfnt) at offset 0x7449 5860 bytes
font_01_sfnt_off0000882d.bin
9f81b8d3209132a2ead53a78ad14670fdbaaf2626d951c1b1ea627932ba3709b
pdf-font-stream PDF embedded font (sfnt) at offset 0x882D 10304 bytes
font_02_sfnt_off0000ab9f.bin
ab53cee0473a48f81ec72991c6ca4257bf7dcb6581fca3b5088b2f5292c41203
pdf-font-stream PDF embedded font (sfnt) at offset 0xAB9F 8040 bytes