Malicious PDF — malware analysis report

Static analysis result for SHA-256 024cf6da6fe109f1…

MALICIOUS

PDF

141.8 KB Created: 2020-08-11 20:16:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc6e3435b6e2c4b04e91cfc7a8187b54 SHA-1: 3730a1cbd3d73596ad99ad1819c8ab37287445f1 SHA-256: 024cf6da6fe109f166f07d0290bfabda30bf9ba7b36fa70108c767976c706584
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm and a critical redirector link pointing to ttraff.com, which is known malicious infrastructure. The document body, though heavily obfuscated, contains the URL and keywords suggesting a lure for a movie script. The ML classifier also strongly indicated maliciousness.

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=american+psycho+movie+script+pdf
    • http://files.monalisamugshots.net/uploads/1/3/1/0/131070971/82db66fd5e.pdf
    • http://files.heritagegspkennels.com/uploads/1/3/2/6/132681579/pudeg-vawosezokanapux-vajafiniz.pdf
    • http://seseken.eiapt.com/uploads/1/3/0/9/130969754/78e81e39cfd.pdf
    • http://files.medicinalplantsinnigeria.com/uploads/1/3/1/3/131380279/woxedapi-zuraxezaguti-bokepalo-rolabetarixe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0490/3069/files/jifagegupepipifezofukutex.pdf
    • https://cdn.shopify.com/s/files/1/0437/0654/8377/files/adobe_illustrator_free_trial.pdf
    • https://cdn.shopify.com/s/files/1/0429/6923/5619/files/searching_and_sorting_programs_in_c.pdf
    • https://cdn.shopify.com/s/files/1/0428/2518/7491/files/changing_documents.pdf
    • https://cdn.shopify.com/s/files/1/0436/1977/8723/files/74676658630.pdf
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/atharva_veda_original_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/7631/1447/files/candida_glabrata_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0435/2868/3672/files/seniv.pdf
    • https://cdn.shopify.com/s/files/1/0430/9765/3397/files/3251041492.pdf
    • https://cdn.shopify.com/s/files/1/0435/8681/4109/files/sadudataturoraru.pdf
    • https://cdn.shopify.com/s/files/1/0428/9508/1635/files/contaminacion_del_aire_en_mexico.pdf
    • https://cdn.shopify.com/s/files/1/0431/5162/2306/files/dukaxal.pdf
    • https://cdn.shopify.com/s/files/1/0434/0930/9848/files/cuisinart_little_pro_plus.pdf
    • https://cdn.shopify.com/s/files/1/0428/1283/3959/files/36496163035.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_off0001f21a.bin
6b1179f7f00b8f87635b9f94c4634b90440d41cddb35813a5c325113743b4987		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F21A 5512 bytes
font_01_sfnt_off000204a6.bin
eafca8cfac627f1ff67daaca48ae239273538b9ca35e5bbdfd83e8b0ebb6adf9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x204A6 10816 bytes

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