Malicious PDF — malware analysis report

Static analysis result for SHA-256 42af22f9de6370bb…

MALICIOUS

PDF

43.7 KB Created: 2020-08-04 17:54:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d03048a44a9cc0fbf0e9b55e80cdfbc7 SHA-1: f8de24193594089fddbc158cdd479f3b5449a76b SHA-256: 42af22f9de6370bbd0edb33e3fb8286c3cb043a348eadcfa451e84c66c361974
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, which is further supported by the presence of a link farm heuristic. The document body, though heavily obfuscated, contains a URL that appears to be part of the lure. The primary malicious URL identified is https://ttraff.cc/pify?keyword=himalayan+university+bsc+mlt+syllabus+pdf, which likely leads to a malicious payload or phishing page.

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.cc/pify?keyword=himalayan+university+bsc+mlt+syllabus+pdf
    • http://files.brittpixphotography.com/uploads/1/3/0/8/130813577/wefonigebotug.pdf
    • http://files.brunnerfarm.net/uploads/1/3/1/4/131437683/mevekixujaso-ximefumujop-puvunolegaxojit-nunusa.pdf
    • http://files.richardbogle.com/uploads/1/3/1/6/131637169/pedugofegazesuk_wuduluketaza_wuzuvow.pdf
    • http://files.yael-levy.com/uploads/1/3/0/9/130969403/zisikabo.pdf
    • http://files.olsyouth.com/uploads/1/3/0/7/130775368/netitogivuza.pdf
    • https://cdn.shopify.com/s/files/1/0435/2655/3755/files/zenixepemenef.pdf
    • https://cdn.shopify.com/s/files/1/0429/1470/9663/files/sebugiwinavivinebirim.pdf
    • https://cdn.shopify.com/s/files/1/0429/1841/2451/files/blaze_of_eventide.pdf
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/53702856867.pdf
    • https://cdn.shopify.com/s/files/1/0433/8620/8406/files/75379708296.pdf
    • https://cdn.shopify.com/s/files/1/0432/6418/0390/files/95844707932.pdf
    • https://cdn.shopify.com/s/files/1/0433/2349/0457/files/tuviburor.pdf
    • https://cdn.shopify.com/s/files/1/0430/5725/0455/files/2123799434.pdf
    • https://cdn.shopify.com/s/files/1/0431/0482/9602/files/dozitumomirumemir.pdf
    • https://cdn.shopify.com/s/files/1/0430/4896/0151/files/17342641612.pdf
    • https://cdn.shopify.com/s/files/1/0437/6592/3997/files/97600061669.pdf
    • https://cdn.shopify.com/s/files/1/0428/2961/1171/files/countdown_timer_9_minutes.pdf
    • https://cdn.shopify.com/s/files/1/0431/5371/9453/files/33390753642.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_off00006c74.bin
3e9d18c7e610b6891692dc3301667067fef86437c328d0f1d03cbb108f8cdda4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C74 5564 bytes
font_01_sfnt_off00007f48.bin
236ed94b4ee3f91a82147a28324726c8583bd56469cfa13ab6cfdc8edbd81c34
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F48 10072 bytes