Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5f307d1a07fd2af…

MALICIOUS

PDF

40.0 KB Created: 2020-08-10 08:24:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06246fe3465d7389c9b1745c2e1e7814 SHA-1: 093c3fe1e01442715820a7f47f9c158e3b614246 SHA-256: a5f307d1a07fd2af0502c25eab3598351167c6b6f65fbbee527069efbb757be9
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'anatomical positions of the body pdf' and a URL that appears to be part of a link farm designed to lure users into clicking malicious links. The primary malicious link is https://ttraff.cc/pify?keyword=anatomical+positions+of+the+body+pdf, which redirects to further content.

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.cc/pify?keyword=anatomical+positions+of+the+body+pdf
    • http://files.rainbowfarmsmaine.com/uploads/1/3/2/7/132710748/sotarijixaju_lezodudox_kibep_filuruvaga.pdf
    • http://files.christismysaviorministries.org/uploads/1/3/1/4/131453124/7705750.pdf
    • http://files.thefabriclibraryenniskillenltd.com/uploads/1/3/1/3/131380343/9931805.pdf
    • https://cdn.shopify.com/s/files/1/0430/3768/7962/files/sudaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/28021490425.pdf
    • https://cdn.shopify.com/s/files/1/0433/7300/2906/files/job_order_costing_in_managerial_accounting.pdf
    • https://cdn.shopify.com/s/files/1/0435/5653/6471/files/nuradi.pdf
    • https://cdn.shopify.com/s/files/1/0430/2569/4883/files/28663543235.pdf
    • https://cdn.shopify.com/s/files/1/0432/5706/9721/files/lumad.pdf
    • https://cdn.shopify.com/s/files/1/0430/7845/1351/files/6889427933.pdf
    • https://cdn.shopify.com/s/files/1/0433/3607/3366/files/1246024182.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6654/files/56043817422.pdf
    • https://cdn.shopify.com/s/files/1/0437/4354/3450/files/neumonia_por_chlamydophila_pneumoniae.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30408896218.pdf
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/al_quran_30_juz.pdf
    • https://cdn.shopify.com/s/files/1/0433/1739/5611/files/bach_air_on_g_string_sheet_music.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_off00005e11.bin
cd36d1d1a58228b61bdab1bbe329436a01b98bcd0e9c0442af207577d64312c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E11 5528 bytes
font_01_sfnt_off000070c0.bin
2919aa4480e82cbdf652427338968988069104e41d7196528face7a7c4769623
pdf-font-stream PDF embedded font (sfnt) at offset 0x70C0 10020 bytes