Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d245fcd92e695c8…

MALICIOUS

PDF

47.1 KB Created: 2020-08-12 12:47:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 011501be39ea504e2b49490aeedb8b10 SHA-1: a0e79b1b6f3040f3e514bd22f17e8829e6eb9e5d SHA-256: 1d245fcd92e695c8d232aa592d4205cea06170a331969385b27142b0ba0d9197
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'arabic letters and sounds' and includes the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/pify?keyword=introduction+to+arabic+letters+and+sounds+pdf
    • http://files.termarkleather.com/uploads/1/3/2/6/132682665/85b01c3aa355523.pdf
    • http://files.donnasboy.com/uploads/1/3/0/7/130775025/xezegejedu-gevegi-mubijotu.pdf
    • http://files.davemcdermand.com/uploads/1/3/2/6/132695805/kubulus_mipufamenu_nuzoxelata.pdf
    • http://gojorab.kcbeckerphotography.com/uploads/1/3/0/7/130775432/rugulufutuvekij-wudeligive-xafumesovirofu-kopixosewu.pdf
    • http://files.tonywithers.co.uk/uploads/1/3/1/6/131606490/jalaxifawo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4529/8074/files/livabukojeki.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/magobusiriwolozun.pdf
    • https://cdn.shopify.com/s/files/1/0432/0637/7633/files/past_tense_and_present_perfect_tense_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0429/0802/4985/files/57373267292.pdf
    • https://cdn.shopify.com/s/files/1/0432/6657/2452/files/irenaean_theodicy.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kewosa.pdf
    • https://cdn.shopify.com/s/files/1/0428/4085/0598/files/xiserofep.pdf
    • https://cdn.shopify.com/s/files/1/0432/7427/2924/files/fajegugisokakubepalazuw.pdf
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/4120447573.pdf
    • https://cdn.shopify.com/s/files/1/0429/0235/6127/files/35385206553.pdf
    • https://cdn.shopify.com/s/files/1/0430/9814/4932/files/62597517939.pdf
    • https://cdn.shopify.com/s/files/1/0429/8860/1503/files/amenaza_parto_pretermino_2020.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000941f.bin
2b0c6282ac7b0d4b45382c06d6b1d3fa06e2832c5f7d0d6a68e0a77818c6d93b
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x941F 17792 bytes
font_00_sfnt_off00005feb.bin
861fe3c781f8e94db9601c290a812f683226b6f514b49fc2d6033ed65c1e0775
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FEB 5224 bytes
font_01_sfnt_off000071b3.bin
ff45eef12c46e627f2c477d97f439d98fca8d0a9953ecf2d23626efe8ae3ce39
pdf-font-stream PDF embedded font (sfnt) at offset 0x71B3 10064 bytes