Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc558b0ec1c586c7…

MALICIOUS

PDF

42.7 KB Created: 2020-08-10 14:01:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 387cc2b97e480cadb13bfd8adf9b1187 SHA-1: 39edfcc9f07e295d50939f1df74942ccf49521dc SHA-256: bc558b0ec1c586c7df7880b7e5fa8171524861a6e257e8b42c7ce8af8badd267
128 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, contains text related to 'Print webpage to pdf chrome' and a call-to-action phrase, suggesting a lure to trick users into clicking the malicious link. The presence of a link farm further indicates a malicious intent to distribute links.

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/pify?keyword=print+webpage+to+pdf+chrome
    • http://files.presidiocountysheriff.com/uploads/1/3/1/0/131070842/gavegaxopugefi-tokig.pdf
    • http://files.bomabostontoby.com/uploads/1/3/1/3/131381363/bf6da5ccd28dd3.pdf
    • http://files.franksfrenchies.com/uploads/1/3/0/7/130776276/majinu_jofak_pekadizelidutet_valatefujugaz.pdf
    • https://cdn.shopify.com/s/files/1/0435/7901/5327/files/51939618032.pdf
    • https://cdn.shopify.com/s/files/1/0431/5296/5792/files/powtrka_czasw_angielski_wiczenia.pdf
    • https://cdn.shopify.com/s/files/1/0437/9967/5041/files/mnemonic_dictionary_for_gre.pdf
    • https://cdn.shopify.com/s/files/1/0430/8867/4967/files/6221113867.pdf
    • https://cdn.shopify.com/s/files/1/0431/5470/2496/files/sword_art_online_light_novels_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71340125447.pdf
    • https://cdn.shopify.com/s/files/1/0434/4545/2967/files/isometric_ankle_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0431/6754/7546/files/twentieth_century_analytic_philosophy.pdf
    • https://cdn.shopify.com/s/files/1/0435/4582/1333/files/75431574339.pdf
    • https://cdn.shopify.com/s/files/1/0431/1924/7514/files/golusi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2167/2356/files/posemiparetilijagufelowam.pdf
    • https://cdn.shopify.com/s/files/1/0437/6775/8999/files/descent_with_modification.pdf
    • https://cdn.shopify.com/s/files/1/0439/2206/3515/files/march_madness_2017_bracket.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_off000068db.bin
2931b958ea6fec890d54b02256c5e318d4e056687e1107be7060a7414cf64299
pdf-font-stream PDF embedded font (sfnt) at offset 0x68DB 5592 bytes
font_01_sfnt_off00007bb4.bin
fef98a243420f94144eed218edb356695d4deb12a7ba45630a3c20305cfe3df1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB4 10016 bytes