Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4498665ad430a8d…

MALICIOUS

PDF

35.8 KB Created: 2020-08-06 18:33:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b7604a6dfbcd0fe8f9df90680dec334 SHA-1: a037106d0ee65ea30571eef4b25b8e3584957329 SHA-256: d4498665ad430a8dc26e455170e325abd1ab4e10c16b38e318db13a0d8663168
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains the title 'Alfredo bosi literatura brasileira pdf' and references wkhtmltopdf, suggesting a lure to download a PDF. The primary attack pattern involves redirecting users to malicious infrastructure via these embedded links.

Heuristics 3

  • 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.
  • 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=alfredo+bosi+literatura+brasileira+pdf
    • http://turuteza.roundstoneponyshow.com/uploads/1/3/1/4/131453698/xodolivefupu-navawogubixeve-fuvizapofuginew-pizusi.pdf
    • http://files.surfergirl.us/uploads/1/3/1/4/131453431/fimutixojebipebepili.pdf
    • http://files.headphonemusiclabel.com/uploads/1/3/1/4/131437889/gidisuzivasajo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6890/6906/files/tuvoleribigozoduvowug.pdf
    • https://cdn.shopify.com/s/files/1/0433/9885/6871/files/pabuvug.pdf
    • https://cdn.shopify.com/s/files/1/0429/9997/1999/files/70931964852.pdf
    • https://cdn.shopify.com/s/files/1/0432/7417/4632/files/pisunubexovanigoni.pdf
    • https://cdn.shopify.com/s/files/1/0430/2100/9053/files/32331414007.pdf
    • https://cdn.shopify.com/s/files/1/0434/7117/5846/files/9177261830.pdf
    • https://cdn.shopify.com/s/files/1/0429/2670/2758/files/50331608213.pdf
    • https://cdn.shopify.com/s/files/1/0431/8547/1656/files/worakotesagonidegixugok.pdf
    • https://cdn.shopify.com/s/files/1/0434/1887/8117/files/25463543250.pdf
    • https://cdn.shopify.com/s/files/1/0432/7515/7670/files/ishikawa_cause_and_effect_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0437/9394/0629/files/lafututaronetoxuzotazo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9461/4940/files/71884444230.pdf
    • https://cdn.shopify.com/s/files/1/0433/6055/1070/files/69598330662.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_off00004ecb.bin
a1b5b5e4896dc3f287effd191eab0a7e2a3409aacf7fe8cc72d03d81a28eba9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4ECB 5164 bytes
font_01_sfnt_off00006067.bin
fc930536b854b00b9ef2905479545c3adf4e188451a9ccc7840bd73279e8c4bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6067 10064 bytes

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