Malicious PDF — malware analysis report

Static analysis result for SHA-256 90ed9348ca2475c9…

MALICIOUS

PDF

49.8 KB Created: 2020-08-19 03:24:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ce7a8ba8c4618ccbe6144dbb0bcaeeb SHA-1: 4bffe1e160e1edfb54233aeaad4218b585623dce SHA-256: 90ed9348ca2475c9c0c21c36cdc30a163f654048fec1507467c83282a4239ab6
128 Risk Score

Malware Insights

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

The PDF contains a prominent call-to-action disguised as examination form information, which is a common lure for phishing. The document body and heuristics indicate the presence of embedded links, with one specifically identified as a malicious redirector. This redirector leads to a URL that appears to be part of a link farm, likely designed to obscure the final malicious destination.

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=ccs+university+examination+form+last+date
    • http://files.roccasbakery.com/uploads/1/3/0/9/130969405/texelevuw_goraritafapajob.pdf
    • https://cdn.shopify.com/s/files/1/0435/8039/1585/files/75377844734.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4704/files/18724230874.pdf
    • https://cdn.shopify.com/s/files/1/0431/7973/7237/files/kilugopuj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9508/1635/files/basic_concepts_of_object_oriented_programming_in_java.pdf
    • https://cdn.shopify.com/s/files/1/0433/4167/6694/files/batman_the_killing_joke_comic_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/logical_fallacies_exercises_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/3070/8385/files/192._168_0._1_centurylink.pdf
    • https://cdn.shopify.com/s/files/1/0434/6229/5716/files/infosys_aptitude_questions_and_answers_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/5530/7159/files/convert_to_word_doc_mac.pdf
    • https://cdn.shopify.com/s/files/1/0430/8385/8080/files/weburuzadijatilezisaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/0475/6121/files/ravi_prakash_name_ringtone.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/71299233386.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0000a977.bin
c9772b2d952f6797d9fea9da83f0903ab1060aab688100452a7977688f3f9f78
decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA977 4244 bytes
font_00_sfnt_off000066f8.bin
0eb277d5b9b7b17dc658f55d9ef778be2ed627557a6edbd08f3d8156d91a4514
pdf-font-stream PDF embedded font (sfnt) at offset 0x66F8 5304 bytes
font_01_sfnt_off000078f3.bin
e24c97e63b5b6dbd8626672a8e7d2a8c1e311e0eb2af589681e939ebfbd1cf9d
pdf-font-stream PDF embedded font (sfnt) at offset 0x78F3 10084 bytes
font_02_sfnt_off00009b76.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B76 4324 bytes