Malicious PDF — malware analysis report

Static analysis result for SHA-256 05ff21c41f5eefea…

MALICIOUS

PDF

33.2 KB Created: 2020-08-08 17:47:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69686ba3e2dcdaf594915d3b63a8da63 SHA-1: 58f2b6f11a3a7af66ffa0777411fd627206021b3 SHA-256: 05ff21c41f5eefea99e6f5ef0aadb4897d01df2159a19272f5c60ab4611b2e5c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to redirector infrastructure. The primary malicious URL identified is ttraff.com, which is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. This suggests the document is designed to lure users into clicking malicious links, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.com/pify?keyword=annex+14+icao+pdf
    • http://files.kevinbirdteachingportfolio.com/uploads/1/3/1/8/131871745/8285937.pdf
    • http://files.liloli.org/uploads/1/3/0/9/130969225/vadiwosebuv_jetaxobabivixok.pdf
    • http://files.ktvfphotography.com/uploads/1/3/2/6/132682976/zarovudepijij-gimejowujijaza.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/1519/1202/files/28454862560.pdf
    • https://cdn.shopify.com/s/files/1/0431/9975/8497/files/42159533186.pdf
    • https://cdn.shopify.com/s/files/1/0431/8186/7176/files/77547950177.pdf
    • https://cdn.shopify.com/s/files/1/0439/6960/9886/files/mind_your_language_season4.pdf
    • https://cdn.shopify.com/s/files/1/0431/9808/7328/files/desuminafo.pdf
    • https://cdn.shopify.com/s/files/1/0429/2755/4723/files/pisipefoxatuta.pdf
    • https://cdn.shopify.com/s/files/1/0450/8883/3701/files/how_to_run_python_script_in_linux.pdf
    • https://cdn.shopify.com/s/files/1/0430/0147/9321/files/susimukaxuzopifasinuxu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9587/5989/files/mizevineb.pdf
    • https://cdn.shopify.com/s/files/1/0434/0776/9750/files/xixokexulitekakifu.pdf
    • https://cdn.shopify.com/s/files/1/0435/1829/6228/files/33357054826.pdf
    • https://cdn.shopify.com/s/files/1/0436/2053/2386/files/97449190647.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/namosibak.pdf
    • https://cdn.shopify.com/s/files/1/0429/7264/3491/files/briggs_and_stratton_repair_manual_271172.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000046c6.bin
fd75cf971a462aad26add91d68110c7ef92e24a9a3777fc1207d6c403f7b567d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46C6 5040 bytes
font_01_sfnt_off0000581b.bin
3d401f61d37309fa705d465b6933db93f9fc82b731966490cf691f5883f08ce7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x581B 9356 bytes

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