Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5497652cb88980e…

MALICIOUS

PDF

45.8 KB Created: 2020-08-29 20:42:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a56e26f6849121809a309cefc22a2d35 SHA-1: 43019f52ebffced63a1d347bbecd36f08963516d SHA-256: d5497652cb88980e2f70681ea78282360f4e160246eb5e11e3383ef3276e26ec
128 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. It also exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL and a benign-looking PDF file hosted on Shopify, suggesting a lure to download further content. The presence of a 'download button' heuristic reinforces the social engineering aspect.

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/wix?keyword=pokemon+black+walkthrough+indonesia
    • https://cdn.shopify.com/s/files/1/0432/3577/0532/files/fupogalifurepawamipewap.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/tofosugamoxiruzesijamifa.pdf
    • https://cdn.shopify.com/s/files/1/0430/4853/4167/files/anatomie_humaine.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/59953169317.pdf
    • https://cdn.shopify.com/s/files/1/0430/0675/4970/files/handmade_gift_certificates_templates.pdf
    • https://cdn.shopify.com/s/files/1/0429/2201/6934/files/zolixo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5856/1173/files/setopalodudizur.pdf
    • https://cdn.shopify.com/s/files/1/0431/6368/0929/files/pdf_to_jpg_converter_freeware_software.pdf
    • https://cdn.shopify.com/s/files/1/0433/9410/5509/files/kekokinanizipebozobu.pdf
    • https://static.usrfiles.com/ugd/b8c837_3632ca7fdb0a49d7815eace3d6f9d49d.pdf
    • https://static.usrfiles.com/ugd/b8c837_680cec348eef439dabd0a506550f8eb2.pdf
    • https://static.usrfiles.com/ugd/77d535_5622801c8725480a991cda6adef85895.pdf
    • https://cdn.shopify.com/s/files/1/0431/2596/4949/files/wordscapes_answers_level_8599.pdf
    • https://cdn.shopify.com/s/files/1/0435/2992/8872/files/revolution_season_3.pdf
    • https://cdn.shopify.com/s/files/1/0432/4117/7248/files/16026791703.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99913566500.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_off000066c3.bin
18d8ff977434ccb4a20b5dd69d5e33d59c1b3ee41b3f4dc6e26e9df17426e469
pdf-font-stream PDF embedded font (sfnt) at offset 0x66C3 5532 bytes
font_01_sfnt_off00007968.bin
eb0dc727dfe4c7cf4fc7b706a5e31a8ead677065b2b78dbac3663326554eb2a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7968 10108 bytes
font_02_sfnt_off00009bcb.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0x9BCB 4324 bytes