Malicious PDF — malware analysis report

Static analysis result for SHA-256 626cb064ed30c52a…

MALICIOUS

PDF

43.6 KB Created: 2020-08-07 16:03:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 300124f4a88c0e688b286a0556a3ad79 SHA-1: 035925b76923d1dd3d29842721d1f0aa6420a50b SHA-256: 626cb064ed30c52a7c1cdf803db9ecba20a2077c6b72d543c7caee9116580669
194 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are identified as a link farm or redirectors to malicious content. The primary malicious redirector URL is https://ttraff.com/pify?keyword=trends+in+the+periodic+table+pdf, which is likely intended to lead the user to a phishing or malware download page. The presence of many external PDF links suggests an attempt to manipulate search engine results or distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=trends+in+the+periodic+table+pdf
    • http://files.okusag.com/uploads/1/3/0/7/130739601/97d04a1adec2c7.pdf
    • http://files.audrashouseofcakes.com/uploads/1/3/2/7/132740804/wibuzidunigep_girusativode_lirimurefuwo.pdf
    • http://zobuj.derekpublishing.co/uploads/1/3/0/7/130776257/sikegejitagegepogu.pdf
    • http://files.dtranquility.com/uploads/1/3/0/7/130775466/xopopel-xeteboxuga-xazatokugu.pdf
    • http://files.waiaholenurserygardenandfloralgifts.com/uploads/1/3/0/7/130738870/vanowimirov.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/0749/2775/files/monoprice_select_mini_v2.pdf
    • https://cdn.shopify.com/s/files/1/0430/5967/5293/files/23452975924.pdf
    • https://cdn.shopify.com/s/files/1/0432/3013/4427/files/4905434134.pdf
    • https://cdn.shopify.com/s/files/1/0432/8180/9558/files/50506245217.pdf
    • https://cdn.shopify.com/s/files/1/0432/5107/3192/files/how_do_you_cheat_on_2048.pdf
    • https://cdn.shopify.com/s/files/1/0431/8432/4770/files/pezafazevat.pdf
    • https://cdn.shopify.com/s/files/1/0428/0470/7491/files/21585302361.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/bernal_diaz_del_castillo_biografia.pdf
    • https://cdn.shopify.com/s/files/1/0428/4288/2215/files/9368128565.pdf
    • https://cdn.shopify.com/s/files/1/0433/6936/5654/files/79884263316.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/646255477.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_off00006cc0.bin
7e68fea52edbcad7b18ffff0603cec5f35fb8b02876a14db0d6a06d7641a3f56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC0 5332 bytes
font_01_sfnt_off00007ecf.bin
b5403d027ccbf60c8c54720f5249f12a218b949a6714de482db3c510e96016d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ECF 10120 bytes

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