Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bc4513fe4597a01…

MALICIOUS

PDF

46.0 KB Created: 2020-08-30 09:13:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f119cd87e9796102c8ae0a1b83328cd7 SHA-1: ec316757583930c0f700b18f012bc77507daff37 SHA-256: 5bc4513fe4597a01c614b9dfc2988a412f72f4bcf7494433da5c47372c2b6479
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/wix?keyword=volume+of+clyinder', suggesting a lure to external content. The presence of many external PDF links further indicates a link farm or SEO spamming attempt, designed to drive traffic to malicious infrastructure.

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.com/wix?keyword=volume+of+clyinder
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/f523c3_6a2522dc39174649a92c86aac79a06e7.pdf
    • https://static.usrfiles.com/ugd/b8c837_4db56a3895fa4965a81bf66695c320eb.pdf
    • https://static.usrfiles.com/ugd/bd5c68_8745d5102a134f13ac88fc83473c5601.pdf
    • https://static.usrfiles.com/ugd/a18aa6_a4102fd8ac4f4211a0a1b0c190e0de34.pdf
    • https://static.usrfiles.com/ugd/b8c837_623562211cd74c198580d61541629065.pdf
    • https://static.usrfiles.com/ugd/158fb9_e445ac9ad275417fab71d51c2b5e1cf2.pdf
    • https://static.usrfiles.com/ugd/b8c837_e9fb4bbf97cd4172a2019ae9ecb25e06.pdf
    • https://static.usrfiles.com/ugd/b8c837_7766d10a3d1948df888cf8c94ca6f3d8.pdf
    • https://static.usrfiles.com/ugd/b8c837_d82431258d294cb28df6f2b71e44f2a7.pdf
    • https://static.usrfiles.com/ugd/b8c837_4c41bea29aba489cbd092bdc608078f5.pdf
    • https://static.usrfiles.com/ugd/b8c837_4c58c9a7c9fd41f289613862a81d34b7.pdf
    • https://static.usrfiles.com/ugd/b8c837_5f600633f2ff4fc5b198964fd0905691.pdf
    • https://static.usrfiles.com/ugd/b52961_d317cc78603e4c2cb38348bdd29abe23.pdf
    • https://cdn.shopify.com/s/files/1/0428/8924/8924/files/41630305781.pdf
    • https://cdn.shopify.com/s/files/1/0441/0540/0472/files/botukideriluvifodox.pdf
    • https://cdn.shopify.com/s/files/1/0450/2516/5470/files/bank_job_preparation_book.pdf
    • https://cdn.shopify.com/s/files/1/0464/6528/6302/files/wapking_movie_2017.pdf
    • https://cdn.shopify.com/s/files/1/0437/6723/4714/files/natakam_full_movie_hd_telugu.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_off00006c28.bin
d6a33e5c85ebc385b1144fa18ecc8645163ec24975df1eaedc0206040b4dcc18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C28 4844 bytes
font_01_sfnt_off00007c95.bin
816ff6feac32794e96518329768ffbba55afc4bac072db5eb36ece4862804643		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C95 14020 bytes

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