Malicious PDF — malware analysis report

Static analysis result for SHA-256 b545f29bf94a53f7…

MALICIOUS

PDF

47.1 KB Created: 2020-08-24 00:19:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c982353249670f6bc8cfc17fc62fe5c SHA-1: c48fb4e92a86391c6150b6f9d27ff446138057f1 SHA-256: b545f29bf94a53f7ae4125ef49a3866ea7008d0cd065ce35a733c7481fc2970e
128 Risk Score

Malware Insights

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

The PDF contains a high number of external links, many pointing to benign Shopify URLs, but one critical link to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains the same malicious URL and a reference to a 'case study pdf file', suggesting a lure. The presence of a 'download button' heuristic further supports the social engineering aspect of this attack. The primary goal appears to be redirecting the user to malicious infrastructure via the 'ttraff.com' link.

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=case+study+pdf+file
    • http://xuvosiv.ucomm.org.uk/uploads/1/3/0/7/130739220/datuvow.pdf
    • http://bupadof.softcinch.com/uploads/1/3/1/3/131380504/dd7776096a0e34b.pdf
    • http://files.genevieveash.com/uploads/1/3/2/8/132814166/8439158.pdf
    • http://files.libertystatetroopers.com/uploads/1/3/0/7/130775871/4602233.pdf
    • http://tunil.lcooperillustration.com/uploads/1/3/0/7/130739751/6de52b4e53f3776.pdf
    • https://cdn.shopify.com/s/files/1/0430/4669/9165/files/numpy_count_nonzero.pdf
    • https://cdn.shopify.com/s/files/1/0432/0637/7633/files/texas_driver_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0433/3810/4985/files/simone_de_beauvoir_feminismo.pdf
    • https://cdn.shopify.com/s/files/1/0463/7858/2171/files/cytopathology_review_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/0756/6239/files/ccie_sp_written_dumps.pdf
    • https://cdn.shopify.com/s/files/1/0435/3641/6936/files/adobe_photoshop_cs6_cracken.pdf
    • https://cdn.shopify.com/s/files/1/0439/2042/5115/files/certyfikat_kompetencji_zawodowych_przewonika_drogowego_ksika.pdf
    • https://cdn.shopify.com/s/files/1/0428/0591/9903/files/89616592079.pdf
    • https://cdn.shopify.com/s/files/1/0436/6240/9881/files/77530700240.pdf
    • https://cdn.shopify.com/s/files/1/0429/8909/3018/files/42714879415.pdf
    • https://cdn.shopify.com/s/files/1/0434/2457/9736/files/27997999511.pdf
    • https://cdn.shopify.com/s/files/1/0438/3493/3408/files/fudutapafujanunel.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_off00007cce.bin
1d1fd5c02889826a0a7f41d4e444fa5a12fdbbaa5669036f38da48bc7f367553
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CCE 4948 bytes
font_01_sfnt_off00008dbc.bin
b954dc9a1971bb160d1a40997c59b1de3f83b94cb548c7e85c95c1cf0ac1f53a
pdf-font-stream PDF embedded font (sfnt) at offset 0x8DBC 10176 bytes