Malicious PDF — malware analysis report

Static analysis result for SHA-256 691bb76a46ffce24…

MALICIOUS

PDF

36.8 KB Created: 2020-08-06 19:24:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74b4578403050eeb7aeba756c365282e SHA-1: 6ce6c6eb8b61fa9b90540253835943d72f87cbad SHA-256: 691bb76a46ffce24b0de7dfbab329fe678cb527d932f803eb5f64345ee569430
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to benign Shopify URLs, but one critical link redirects to known malicious infrastructure at 'ttraff.ru'. The document body is heavily obfuscated but contains the same malicious URL. This suggests the document is designed to trick users into clicking the malicious link, likely leading to further compromise.

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=chaganti+ramayanam+book+pdf
    • http://files.alexbuehler.com/uploads/1/3/2/8/132814969/7889934.pdf
    • http://kovamu.campaignforcloth.com/uploads/1/3/0/7/130776407/3071203.pdf
    • http://files.kharisgrams.com/uploads/1/3/0/8/130874248/vanidemij.pdf
    • http://files.flalaw.pro/uploads/1/3/0/7/130738894/razorosig-jonovokarizomu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0427/8507/9452/files/14724831379.pdf
    • https://cdn.shopify.com/s/files/1/0450/3266/9334/files/notes_on_isomerism_in_organic_chemistry.pdf
    • https://cdn.shopify.com/s/files/1/0437/1464/2069/files/simapukize.pdf
    • https://cdn.shopify.com/s/files/1/0434/0996/5212/files/kuzonisixebu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5732/2903/files/guwejusatakuviroxefidi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4324/9563/files/zerututoxoxulegagamaxetek.pdf
    • https://cdn.shopify.com/s/files/1/0430/8592/2466/files/balasawogixizekenivikux.pdf
    • https://cdn.shopify.com/s/files/1/0428/3914/6662/files/66393194156.pdf
    • https://cdn.shopify.com/s/files/1/0437/3676/0485/files/36038645365.pdf
    • https://cdn.shopify.com/s/files/1/0432/0700/0219/files/56864902062.pdf
    • https://cdn.shopify.com/s/files/1/0441/0834/9592/files/womimitomukivosorur.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_off00004472.bin
3cc28d3f22d1b06df1f79400cee2836f8eb2fb3436c2dbca6c1e340f20da01eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4472 5244 bytes
font_01_sfnt_off00005616.bin
df41b2188dc788e63dfa2655e1d40a87c1e871881fd142391ba8ea8c81d8f634		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5616 10020 bytes
font_02_sfnt_off0000784d.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x784D 4324 bytes

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