Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcdcf4c6c64f805a…

MALICIOUS

PDF

44.3 KB Created: 2020-08-10 13:39:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4664128c0819e60d0d5f4381b9127ec SHA-1: 2bf0add6d41efdf304f8455c1e2a1fb4ddae0c91 SHA-256: bcdcf4c6c64f805a0ee37a0db731546cd31a38564f1c30e05c62345a02bfb0a9
128 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic indicating it links to known malicious redirector infrastructure via the URL 'https://ttraff.com/pify?keyword=convert+webpage+to+pdf+chrome'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links pointing to external resources, including benign Shopify URLs and other unknown PDFs. The presence of a visual download button lure further supports the malicious intent. The document body, though heavily obfuscated, contains the malicious URL and references to PDF conversion tools, suggesting a social engineering pretext.

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.com/pify?keyword=convert+webpage+to+pdf+chrome
    • http://files.learnmeraprojects.com/uploads/1/3/2/6/132695493/9522555.pdf
    • http://files.mvxfocus.com/uploads/1/3/0/7/130739073/dilelawewu.pdf
    • http://files.aoerecording.com/uploads/1/3/1/3/131382491/7262311.pdf
    • http://dakasi.clairepassmore.com/uploads/1/3/1/4/131437736/366084.pdf
    • http://files.joslinelementary.org/uploads/1/3/0/7/130740210/3366443.pdf
    • https://cdn.shopify.com/s/files/1/0433/8132/5987/files/98088373372.pdf
    • https://cdn.shopify.com/s/files/1/0444/3645/5591/files/aramaico_antigo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8937/9993/files/livixenitukalaxika.pdf
    • https://cdn.shopify.com/s/files/1/0431/6191/1458/files/1996_jeep_cherokee_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/8038/4674/files/dunajedadegekuvoxuko.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12509012650.pdf
    • https://cdn.shopify.com/s/files/1/0431/8425/9231/files/house_rent_receipt_format.pdf
    • https://cdn.shopify.com/s/files/1/0432/4291/3952/files/45727088963.pdf
    • https://cdn.shopify.com/s/files/1/0431/7990/1096/files/bajojinajovuziro.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/53469932573.pdf
    • https://cdn.shopify.com/s/files/1/0431/6512/2720/files/piruzexewofajidu.pdf
    • https://cdn.shopify.com/s/files/1/0437/2702/8375/files/hunter_macros_wow_classic.pdf
    • https://cdn.shopify.com/s/files/1/0435/3340/2266/files/43656479449.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_off00006ebb.bin
51ec3850520a153e9cd2f6f4503d9673794a2921878c7661b230162f9ea80154
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EBB 5556 bytes
font_01_sfnt_off00008186.bin
a789f586092107bb237ae60f451da342df92b1451c87c80e7354047facb36e07
pdf-font-stream PDF embedded font (sfnt) at offset 0x8186 10016 bytes