Malicious PDF — malware analysis report

Static analysis result for SHA-256 de47a2bfb6f711a8…

MALICIOUS

PDF

52.6 KB Created: 2020-08-05 14:39:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e5912d8947a54978d1bc79910aa977d SHA-1: b0224e468f8a97fc84882fce6343a327f6ce93ee SHA-256: de47a2bfb6f711a8abeee678bb89e0e2c2d0627ef5851a811e67165f974d58da
128 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one heuristic specifically flagging a link to a known malicious redirector infrastructure (ttraff.cc). Another heuristic indicates a large number of external PDF links, suggesting a link farm for SEO manipulation or to distribute malicious content. The presence of a 'download button' heuristic further supports the lure-based attack pattern. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic.

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=font+awesome+icons+download+pdf
    • http://files.fernandojimenezphoto.com/uploads/1/3/1/6/131637108/lepemusisariraw.pdf
    • http://files.jerichotownlibraryvt.org/uploads/1/3/1/4/131454501/ec79f8.pdf
    • http://files.helenhenryraro.com/uploads/1/3/1/4/131482975/014394e7de5.pdf
    • http://memiwowo.drewkallio.com/uploads/1/3/2/6/132681026/fd6182.pdf
    • https://cdn.shopify.com/s/files/1/0428/3056/1436/files/liquid_rocket_engine_combustion_instability.pdf
    • https://cdn.shopify.com/s/files/1/0437/3292/6616/files/passe_compose_etre_avoir_exercices.pdf
    • https://cdn.shopify.com/s/files/1/0430/8677/4436/files/95023460206.pdf
    • https://cdn.shopify.com/s/files/1/0430/5531/7149/files/18757159375.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/16994954809.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/kabary_betsimisaraka.pdf
    • https://cdn.shopify.com/s/files/1/0434/1818/9980/files/xuwitotiberi.pdf
    • https://cdn.shopify.com/s/files/1/0447/9975/4397/files/define_probability_sampling.pdf
    • https://cdn.shopify.com/s/files/1/0433/7070/9150/files/dabasosokizuwur.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_off000082ac.bin
0b834439d5d7b2738bc77fa4e44f3acabdec406e4c185451473c50aa40929210
pdf-font-stream PDF embedded font (sfnt) at offset 0x82AC 5040 bytes
font_01_sfnt_off000093d4.bin
a540d03cc1c8402c495f0430e9972a12b6f4f52cb368cca7f8e593272c2cd39e
pdf-font-stream PDF embedded font (sfnt) at offset 0x93D4 10352 bytes
font_02_sfnt_off0000b74f.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xB74F 4324 bytes