Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bab7ed63010e8f8…

MALICIOUS

PDF

48.0 KB Created: 2020-08-22 03:29:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1d17d6b6a947f0eff8b78863c714ae9 SHA-1: 11b02b6a09402d2052b068b29781cb66cb124346 SHA-256: 4bab7ed63010e8f813deab030b225f07beee27b5799260b51b9f8cb58d8ed85e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs, with a critical heuristic firing indicating a malicious redirector link to 'https://ttraff.ru/pify?keyword=adornos+navide%25C3%25B1os+manualidades+coronas'. Another critical heuristic identified a PDF link farm, suggesting the document's primary purpose is to host a large number of external links, likely for SEO manipulation or to distribute further malicious content. No scripts were extracted from this sample.

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=adornos+navide%25C3%25B1os+manualidades+coronas
    • http://files.cristen.net/uploads/1/3/2/6/132680781/8879615.pdf
    • http://soduwib.fredtheafghan.com/uploads/1/3/1/4/131438111/918b3136b76.pdf
    • http://vusazopo.damselholiday.com/uploads/1/3/1/6/131606490/7156d6f245.pdf
    • https://cdn.shopify.com/s/files/1/0457/3324/9190/files/75459381549.pdf
    • https://cdn.shopify.com/s/files/1/0462/4488/8730/files/muwofifotox.pdf
    • https://cdn.shopify.com/s/files/1/0433/0936/7454/files/89341159920.pdf
    • https://cdn.shopify.com/s/files/1/0431/4647/7725/files/13096858772.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/dibexuwofufexuvif.pdf
    • https://cdn.shopify.com/s/files/1/0429/0707/4723/files/15193729192.pdf
    • https://cdn.shopify.com/s/files/1/0430/6593/3973/files/davuvojafumuxusi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3902/2494/files/candidate_s_overall_performance.pdf
    • https://cdn.shopify.com/s/files/1/0429/8434/1657/files/xalodefisikumofabowi.pdf
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/makubuxepivatewu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1642/1529/files/78472722360.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/kugagekusezexodorujogarow.pdf
    • https://cdn.shopify.com/s/files/1/0427/8291/6767/files/64569647342.pdf
    • https://cdn.shopify.com/s/files/1/0431/4470/8245/files/15621578997.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/

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ce3.bin
83f99828f16c8b8d941485379a860d8ec5ce02c78f9ea244fdddb6aa19128f97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CE3 5148 bytes
font_01_sfnt_off00006df6.bin
270c8f03eaccecd93bf38fae973aec7317c4c79343d7121eae73942a4db95127		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF6 2504 bytes
font_02_sfnt_off000078fb.bin
0234bbb6b74e57bec615f6068b3fc4fbcdc4105238fba3be4896ad6b29dcfa6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78FB 13608 bytes
font_03_sfnt_off0000a207.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA207 4324 bytes

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