Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa1653988033ae42…

MALICIOUS

PDF

38.4 KB Created: 2020-08-14 23:54:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2bb26c02a33f9227f9d8eeca82533d7 SHA-1: d8b6dbd0514a110d5833ef763b28f67431d2d0e3 SHA-256: aa1653988033ae4236478974f54c55c7bed3661ec68ca0cfb2b4cf579e11ba77
128 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=childminder+home+risk+assessment+template'. This URL is presented within the document body, disguised as a template download. The document also contains a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The presence of a visual download button further supports a lure-based attack pattern.

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/pify?keyword=childminder+home+risk+assessment+template
    • http://files.bikeforlifesd.org/uploads/1/3/1/8/131856446/zufaji.pdf
    • http://files.judithmary.com/uploads/1/3/0/9/130970001/4277096.pdf
    • http://wowol.lydiaannflymasters.com/uploads/1/3/1/3/131379552/ed648b1.pdf
    • https://cdn.shopify.com/s/files/1/0434/4876/2529/files/most_common_idioms_and_phrases_with_meanings_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0437/8266/8437/files/13553226940.pdf
    • https://cdn.shopify.com/s/files/1/0431/7085/7122/files/reliable_time_server.pdf
    • https://cdn.shopify.com/s/files/1/0431/2042/7157/files/26933839477.pdf
    • https://cdn.shopify.com/s/files/1/0433/5216/2462/files/affinity_chromatography_notes.pdf
    • https://cdn.shopify.com/s/files/1/0437/2670/0696/files/fifavixasuvalufotepuziv.pdf
    • https://cdn.shopify.com/s/files/1/0435/7062/6723/files/english_encyclopedia_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0434/3404/9703/files/72087961277.pdf
    • https://cdn.shopify.com/s/files/1/0437/6874/2040/files/2011_bmw_328i_owners_manual.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_off00004cb9.bin
74e5035c1eb5a720ffa1a9db63d9d76845ce1d22cf614942b1dc8bb1ad270dda
pdf-font-stream PDF embedded font (sfnt) at offset 0x4CB9 5072 bytes
font_01_sfnt_off00005dc0.bin
837dc744175fac70c682552897a4a8e819d1c0aad6576412bfba9f8dbd717b25
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC0 9696 bytes
font_02_sfnt_off00007eb1.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EB1 4324 bytes