Malicious PDF — malware analysis report

Static analysis result for SHA-256 f253ba8b540dac8f…

MALICIOUS

PDF

45.9 KB Created: 2020-08-08 18:38:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3b66edafa506d9dd5ed7d83a89ddfbb SHA-1: 62153a8945e34eeb412adcbd37c1ce90dbf47f0a SHA-256: f253ba8b540dac8f577b08c747ac8b93f591ee021e27e8adcc881208d3d8209e
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=texas+automobile+bill+of+sale+form+pdf'. The document body, though heavily obfuscated, also contains this URL and numerous other links hosted on cdn.shopify.com and other domains, suggesting a link farm designed to obscure the malicious redirector. The presence of a 'download button' heuristic 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.cc/pify?keyword=texas+automobile+bill+of+sale+form+pdf
    • http://files.abovetherootscbd.com/uploads/1/3/1/4/131438829/53aca9cae22.pdf
    • http://files.bestoftimeswatch.com/uploads/1/3/0/9/130969206/2129789.pdf
    • http://jirod.spec22sales.com/uploads/1/3/1/6/131637814/6541519.pdf
    • http://dixoxe.bearbugmedia.com/uploads/1/3/1/8/131871745/4484587.pdf
    • https://cdn.shopify.com/s/files/1/0433/5697/9351/files/tuesdays_with_morrie_sparknotes.pdf
    • https://cdn.shopify.com/s/files/1/0428/7214/4038/files/sanatuzelasekonupikujuj.pdf
    • https://cdn.shopify.com/s/files/1/0440/3986/4485/files/duketimisotomotajamadelo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/nubefaro.pdf
    • https://cdn.shopify.com/s/files/1/0438/0544/2209/files/21382962634.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/fugasej.pdf
    • https://cdn.shopify.com/s/files/1/0431/6548/3172/files/adjetivos_en_ingles_comparativos.pdf
    • https://cdn.shopify.com/s/files/1/0433/3161/6918/files/fusionner_en_un_fichier.pdf
    • https://cdn.shopify.com/s/files/1/0430/4306/1913/files/74471908284.pdf
    • https://cdn.shopify.com/s/files/1/0429/7526/4919/files/59792492685.pdf
    • https://cdn.shopify.com/s/files/1/0429/5147/5366/files/86099661012.pdf
    • https://cdn.shopify.com/s/files/1/0433/7795/0870/files/konufapopax.pdf
    • https://cdn.shopify.com/s/files/1/0433/7578/8184/files/pmbok_latest_edition_free_download.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_off0000744e.bin
5d40f95f2be1f42a6c8a128605d4df3ce14edea948deba167322cb20a0093f36
pdf-font-stream PDF embedded font (sfnt) at offset 0x744E 5344 bytes
font_01_sfnt_off0000865b.bin
e1bf3e785da2475b9deb71015a0ec43051e9cdf54cb8beb4aea03409ac41978f
pdf-font-stream PDF embedded font (sfnt) at offset 0x865B 10444 bytes