Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca5b3ba2c1f45932…

MALICIOUS

PDF

44.5 KB Created: 2020-08-03 21:30:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8dc566d823dd51ad8746d3597c7c3840 SHA-1: a30515fa40f918dca308b3a7b4b2ecd7dcf8d4ac SHA-256: ca5b3ba2c1f459326325065208adcb4c98b49d0f65c1bd28c3fb2e3c0899cc79
128 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains text suggesting a lure for 'a level sociology questions and answers pdf'. The primary malicious IOC is the redirector URL, which likely leads to a further stage of the attack. No scripts were extracted from this sample.

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=a+level+sociology+questions+and+answers+pdf
    • http://files.hilltopangusfarm.com/uploads/1/3/1/6/131636965/619e3bd.pdf
    • http://files.lrshows.com/uploads/1/3/1/4/131438260/javafetojifejo-sujedilosujaf.pdf
    • http://files.ranchobonitos.com/uploads/1/3/1/4/131437172/nunopoduna-zowawomu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5981/4306/files/47776536896.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/73852809169.pdf
    • https://cdn.shopify.com/s/files/1/0433/2666/8952/files/gikunogoluj.pdf
    • https://cdn.shopify.com/s/files/1/0428/8489/0790/files/xifagujemube.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/90471260916.pdf
    • https://cdn.shopify.com/s/files/1/0436/5864/1573/files/tukumuvom.pdf
    • https://cdn.shopify.com/s/files/1/0440/1584/5541/files/21835657614.pdf
    • https://cdn.shopify.com/s/files/1/0432/3095/3630/files/touchdown_2_cause_hell_songs.pdf
    • https://cdn.shopify.com/s/files/1/0428/1725/7628/files/kibonatajekevonizatewo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6133/7494/files/32604645306.pdf
    • https://cdn.shopify.com/s/files/1/0433/5088/4505/files/79232103983.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gejazopemovaro.pdf
    • https://cdn.shopify.com/s/files/1/0431/3242/0262/files/digestion_perfecta_deepak_chopra_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0431/5011/4967/files/gifuwatezasu.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_off00006099.bin
9b7aebc855ecb8eed8c143673140242f20f6d36cd7db93985c508f3c68850655
pdf-font-stream PDF embedded font (sfnt) at offset 0x6099 5576 bytes
font_01_sfnt_off000073b2.bin
5e3eb9cfda5cff7f49f8b1eb36d838e66778153a120867a65ab8c5407487fa51
pdf-font-stream PDF embedded font (sfnt) at offset 0x73B2 10216 bytes
font_02_sfnt_off0000966b.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x966B 4324 bytes