Malicious PDF — malware analysis report

Static analysis result for SHA-256 fba930c8c3547139…

MALICIOUS

PDF

36.8 KB Created: 2020-08-24 19:49:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5a7b2bb831375a473da9a84218561c9 SHA-1: 88983cb96491369da53a9c986286fa8fd8813b43 SHA-256: fba930c8c3547139932199be7ce3e4d95be03b9396cf72f48bf9f650e7d316e8
128 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a link farm. One of these links, 'https://ttraff.cc/pify?keyword=civic+education+questions+and+answers+zambia+pdf', points to a known malicious redirector. The presence of a 'download button' heuristic further suggests a lure to trick users into clicking these links. The document body itself is heavily obfuscated and contains the malicious URL, indicating its purpose is to drive traffic to malicious infrastructure.

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=civic+education+questions+and+answers+zambia+pdf
    • http://files.demusproductions.org/uploads/1/3/0/8/130814124/b24768dfdf.pdf
    • http://mimelosof.bakerstreetuniverse.com/uploads/1/3/1/3/131379615/5442872.pdf
    • http://files.discoveringalabama.org/uploads/1/3/1/4/131455158/zalitifujuwi.pdf
    • http://files.dottis.ch/uploads/1/3/1/4/131482886/1187748.pdf
    • https://cdn.shopify.com/s/files/1/0427/9985/7823/files/vibuladorub.pdf
    • https://cdn.shopify.com/s/files/1/0437/6097/6021/files/sirigozobexirirarobiritus.pdf
    • https://cdn.shopify.com/s/files/1/0433/6726/8517/files/fulud.pdf
    • https://cdn.shopify.com/s/files/1/0435/3110/8504/files/21778126728.pdf
    • https://cdn.shopify.com/s/files/1/0433/8873/1546/files/27887147220.pdf
    • https://cdn.shopify.com/s/files/1/0429/5753/7439/files/naxibebetus.pdf
    • https://cdn.shopify.com/s/files/1/0427/5381/8790/files/information_about_ahirani_language.pdf
    • https://cdn.shopify.com/s/files/1/0434/3191/9765/files/93086739982.pdf
    • https://cdn.shopify.com/s/files/1/0448/4051/7792/files/weiser_door_locks.pdf
    • https://cdn.shopify.com/s/files/1/0429/4583/9271/files/biodiversity_conservation_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0440/0257/4494/files/jigevolabumefid.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_off00005028.bin
2ed3c2d893a29ef509c082298c92fd29301ac7514dc985eabbb47a71da5f1207
pdf-font-stream PDF embedded font (sfnt) at offset 0x5028 5644 bytes
font_01_sfnt_off00006349.bin
c59bf9f476093ec848f1947f2d02c1859b673feb023857f83e5b3ccccdcef75f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6349 10228 bytes