Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f3221fa3006712a…

MALICIOUS

PDF

63.8 KB Created: 2020-08-17 07:09:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5d346c5008ba1eaf028760a75fe4e3c SHA-1: c5956474a317912a580823e67538db1389cb2241 SHA-256: 0f3221fa3006712a1b3eae04951670dbc3d287cb6f1cb808bf31c90676ae4f5b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to a link farm designed to appear as legitimate software downloads. One prominent link, 'https://ttraff.ru/pify?keyword=chembiodraw+ultra+free++crack', redirects to a known malicious domain, indicating a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious.

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.ru/pify?keyword=chembiodraw+ultra+free++crack
    • http://gukemono.walnuthillsupc.com/uploads/1/3/2/3/132302936/kilalip.pdf
    • http://files.demhollow.com/uploads/1/3/2/6/132682134/1454989.pdf
    • http://files.mypropertyquestion.com/uploads/1/3/0/8/130814735/809597.pdf
    • http://gifagu.stephencleobury.com/uploads/1/3/1/6/131606575/2090093.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/4227/5479/files/vuwimarubode.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2125/files/strategic_studies.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3301/files/alaipayuthey_movie_songs_isaimini.pdf
    • https://cdn.shopify.com/s/files/1/0437/6556/3549/files/carl_jung_memories_dreams_reflections_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/5597/2501/files/neural_networks_and_deep_learning_book.pdf
    • https://cdn.shopify.com/s/files/1/0446/6376/7203/files/n_vidia_8400gs.pdf
    • https://cdn.shopify.com/s/files/1/0429/8611/1137/files/tipufewidagoxawumizi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7808/1959/files/fovigebeno.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/76640573288.pdf
    • https://cdn.shopify.com/s/files/1/0428/1185/0918/files/benedug.pdf
    • https://cdn.shopify.com/s/files/1/0429/2342/5955/files/fiselazolabadafa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aba5.bin
f5e419de35b57e1ba5c4c07f8557a75bb22dee39ded42c399b8783aabb25c1ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABA5 5284 bytes
font_01_sfnt_off0000bd84.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD84 1800 bytes
font_02_sfnt_off0000c611.bin
cffefec888d543f942d562740768c4d7d92aa6c91c979611ba9bc33895c4bfec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC611 13980 bytes

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