Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8b8ab03aa2cb254…

MALICIOUS

PDF

37.1 KB Created: 2020-08-12 16:12:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7f259e186e1898bb497aebcc3d4dc8d SHA-1: 4a84be876f028341620b0b61f88f238b98a8538a SHA-256: f8b8ab03aa2cb2542fb2cdc1f3e05e95bd50d0aa0e052d24ff412dc7cb78a753
128 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector URL, indicating a phishing or social engineering attempt. The document body, though heavily obfuscated, contains the malicious redirector URL and references a PDF download, aligning with the heuristic findings. The primary malicious URL is https://ttraff.cc/pify?keyword=ashok+kumar+singh+english+grammar+pdf, which likely leads to further malicious content.

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=ashok+kumar+singh+english+grammar+pdf
    • http://files.hellorichmond.org/uploads/1/3/2/7/132712306/7975896.pdf
    • http://files.edgrasso.com/uploads/1/3/0/8/130874030/vajekerogunepifopaw.pdf
    • http://files.bluesandbeer.org/uploads/1/3/1/6/131607163/solozuxare.pdf
    • http://files.atreeanditsfruit.com/uploads/1/3/1/4/131438477/7798059.pdf
    • http://fancli.com/193mk5
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/14646860517.pdf
    • https://cdn.shopify.com/s/files/1/0431/6368/0929/files/24766862114.pdf
    • https://cdn.shopify.com/s/files/1/0433/7578/8188/files/zusaxusuroxirot.pdf
    • https://cdn.shopify.com/s/files/1/0434/5721/6678/files/mujazukisawowofarixawosi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2104/0792/files/12836929581.pdf
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/tifotisip.pdf
    • https://cdn.shopify.com/s/files/1/0435/7003/6904/files/ors_ogden_utah.pdf
    • https://cdn.shopify.com/s/files/1/0443/8307/6518/files/adverbs_of_manner_exercises_1_eso.pdf
    • https://cdn.shopify.com/s/files/1/0431/6053/5196/files/diseases_of_digestive_system.pdf
    • https://cdn.shopify.com/s/files/1/0437/0956/3045/files/megaloblastic_anemia_in_pregnancy.pdf
    • https://cdn.shopify.com/s/files/1/0431/9464/6689/files/20527725601.pdf
    • https://cdn.shopify.com/s/files/1/0429/8611/1137/files/97008671609.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/luzugojozawok.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_off0000528b.bin
65c3debe2e8424a29cc54fccc3c744ffce4b3696c744c93fd9c6cccdb8a49058
pdf-font-stream PDF embedded font (sfnt) at offset 0x528B 5508 bytes
font_01_sfnt_off0000651c.bin
2c8d6f5abab6c96e772e60ede2f6d431d6855a92013079207eeb1588302f3e42
pdf-font-stream PDF embedded font (sfnt) at offset 0x651C 10068 bytes