Malicious PDF — malware analysis report

Static analysis result for SHA-256 42fe412a771de208…

MALICIOUS

PDF

38.3 KB Created: 2020-08-19 11:58:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c30a3b05f53a800c0cdc4f794f6a3f9c SHA-1: 07325cf1be64fa04baeb3ed09033d0ac03204f8a SHA-256: 42fe412a771de20891ac666405c897d8aece7b768ba7754ccb94e4c65b2f5387
128 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=online+pdf+to+excel+converter+sejda'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains references to the converter lure and the malicious redirector URL. The presence of a 'Download Now' type phrase further supports a social engineering pretext.

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=online+pdf+to+excel+converter+sejda
    • http://files.alicebeecherpoetry.org/uploads/1/3/0/7/130775387/lovumonebunan.pdf
    • http://gikifur.dhkayaking.com/uploads/1/3/1/4/131454165/5988065.pdf
    • http://kekalep.crowdedbedcreations.com/uploads/1/3/0/7/130738970/nixerox_badezolipifijij_wafiju_remofera.pdf
    • https://cdn.shopify.com/s/files/1/0435/8438/9275/files/paypal_donate_button.pdf
    • https://cdn.shopify.com/s/files/1/0436/1961/4882/files/nujawivufipavuxeboxikuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/4484/8295/files/26029432605.pdf
    • https://cdn.shopify.com/s/files/1/0447/2376/5402/files/50097152170.pdf
    • https://cdn.shopify.com/s/files/1/0435/8701/0715/files/31964938837.pdf
    • https://cdn.shopify.com/s/files/1/0428/4963/2412/files/fapovalonilogabusotix.pdf
    • https://cdn.shopify.com/s/files/1/0430/9113/2567/files/vixerodalup.pdf
    • https://cdn.shopify.com/s/files/1/0428/8036/8796/files/xukupagoxenemu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0649/2823/files/didisimofebukapemo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5476/8021/files/tobukedazawo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0098/6787/files/mad_world_piano_sheet_music_beginners.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_off00005830.bin
1f5372c106f7c582562a8e6bcb5e8205fa90b0f7b37ab5a431dc8ae1d8bd596c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5830 5380 bytes
font_01_sfnt_off00006a95.bin
b012694ab89710ddafddea3c2bf984025ff8a2c3bb2fbb2f6b61c2dd952181ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A95 9864 bytes