Malicious PDF — malware analysis report

Static analysis result for SHA-256 657f0aa5948c35ac…

MALICIOUS

PDF

52.3 KB Created: 2020-08-01 16:25:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d83d68895e253ff4806b980842dbc8a2 SHA-1: 2ff06d6bdf1fba25bc28cdf3098e237c34e2bdd7 SHA-256: 657f0aa5948c35ac7d5665efe7079568db6b497934923506e210e815e34f27ff
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a reference to the malicious URL 'https://ttraff.ru/pify?keyword=python+dictionary+append'. This suggests the PDF is designed to trick users into visiting malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, but the presence of embedded URLs and the ML classifier's high confidence indicate malicious intent.

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=python+dictionary+append
    • http://files.nikarey.com/uploads/1/3/0/9/130968984/f3d738c0178.pdf
    • http://files.phoenixhypnobirthing.com/uploads/1/3/1/4/131408942/majirakubit_fariwiwemajaren_rumanurimonizeg.pdf
    • http://files.suyana.net/uploads/1/3/1/0/131070539/fepizimomuk_xibobofem_gaguzeligofuzu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/5249/1159/files/xukajajedi.pdf
    • https://cdn.shopify.com/s/files/1/0434/8982/0836/files/rorapa.pdf
    • https://cdn.shopify.com/s/files/1/0434/9162/3074/files/marco_gonzales_fangraphs.pdf
    • https://cdn.shopify.com/s/files/1/0431/7426/4993/files/7075964148.pdf
    • https://cdn.shopify.com/s/files/1/0432/7201/1941/files/mumudejimizigigorew.pdf
    • https://cdn.shopify.com/s/files/1/0433/5848/6678/files/31891059840.pdf
    • https://cdn.shopify.com/s/files/1/0432/8531/5744/files/38761609933.pdf
    • https://cdn.shopify.com/s/files/1/0431/1135/0439/files/49224855015.pdf
    • https://cdn.shopify.com/s/files/1/0432/2312/2084/files/28298891164.pdf
    • https://cdn.shopify.com/s/files/1/0440/9245/7112/files/45315666286.pdf
    • https://cdn.shopify.com/s/files/1/0429/4790/3654/files/54723055454.pdf
    • https://cdn.shopify.com/s/files/1/0428/0093/9164/files/dematubovaxudi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1928/0288/files/28731682361.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_off000084e0.bin
50f82c7af2e8f2cd3e26c16ce93be39be8d31c9d30de2de1221a90b643d92d5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84E0 5052 bytes
font_01_sfnt_off00009616.bin
8c81c1ef0a56ae220ec5468a719a16965e4d9827983f108230588323e86ac9c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9616 14556 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.