Malicious PDF — malware analysis report

Static analysis result for SHA-256 87f54f5b315ed2ec…

MALICIOUS

PDF

42.1 KB Created: 2020-08-14 07:42:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa2431145e49c7ead8a8d4c625cd95a5 SHA-1: d7656030879eb9f593d5bf075e4a509497ff052d SHA-256: 87f54f5b315ed2ecc5428ab36916c0c2aaf05ec7dd6ea64c9aff7c82dac354eb
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic indicating it links to a known malicious redirector. The document body, though heavily obfuscated, contains URLs that are part of a link farm, with one specifically pointing to the malicious redirector. This suggests the document's primary purpose is to redirect users to malicious sites, likely for phishing or malware delivery. No scripts were extracted from this sample.

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=non+chronological+report+examples+year+3
    • http://files.ratiocoffee.ca/uploads/1/3/1/3/131381607/02d2e1c0d7579.pdf
    • http://fewawoje.classes.interactive-maths.com/uploads/1/3/0/8/130873995/5400375.pdf
    • http://nekaxolub.abc-vermontnewhampshire.com/uploads/1/3/1/4/131437044/e6db0e3925.pdf
    • https://cdn.shopify.com/s/files/1/0429/5327/7589/files/royalty_statement_excel.pdf
    • https://cdn.shopify.com/s/files/1/0445/6172/7647/files/club_penguin_membership_codes_2016.pdf
    • https://cdn.shopify.com/s/files/1/0431/5955/2155/files/cateye_strada_manual.pdf
    • https://cdn.shopify.com/s/files/1/0452/7731/5233/files/91607320428.pdf
    • https://cdn.shopify.com/s/files/1/0429/8850/3203/files/74568326210.pdf
    • https://cdn.shopify.com/s/files/1/0429/2804/6233/files/actaris_sl7000_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/6006/7480/files/sudezurok.pdf
    • https://cdn.shopify.com/s/files/1/0433/4547/7800/files/antibiotics_safe_during_pregnancy.pdf
    • https://cdn.shopify.com/s/files/1/0450/3791/2214/files/19943552889.pdf
    • https://cdn.shopify.com/s/files/1/0432/4920/5405/files/51475090405.pdf
    • https://cdn.shopify.com/s/files/1/0441/4128/1432/files/pair_of_kings_theme_song.pdf
    • https://cdn.shopify.com/s/files/1/0432/5317/0339/files/rujadudumevipu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4703/files/pizazubenanuwezira.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jidaxuno.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_off00006604.bin
24e784764fc083db5ad0b65fd9e00c037dc440f144a9107454bdbe07c45d9895
pdf-font-stream PDF embedded font (sfnt) at offset 0x6604 5652 bytes
font_01_sfnt_off00007913.bin
8b91311d57a8ff55e2c99d07ef03bd4592d41f2279c05649104b9b2b8a6c0c56
pdf-font-stream PDF embedded font (sfnt) at offset 0x7913 10144 bytes