Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad21468b700f0d24…

MALICIOUS

PDF

44.9 KB Created: 2020-08-30 22:15:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f321d2fecfcc02899ec9f0273bb982ad SHA-1: 377255ac8b96ecd94926cc3a5a45578a43dcaf22 SHA-256: ad21468b700f0d24bdc387695e95b9889b05fe033a71bc8ecd99708e068f9298
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, suggesting a link farm. The document body contains a URL that points to a redirector, which in turn leads to a benign Shopify URL. This indicates a likely attempt to use SEO manipulation or redirect users to potentially 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.link/wix?keyword=chevy+truck+5+speed+manual+transmiss
    • https://cdn.shopify.com/s/files/1/0433/1690/4104/files/plural_nouns_worksheet_5th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0430/9532/6887/files/forodagogaragoteg.pdf
    • https://cdn.shopify.com/s/files/1/0427/5604/7004/files/timabagomojiguvo.pdf
    • https://cdn.shopify.com/s/files/1/0440/5516/7126/files/40461714780.pdf
    • https://static.usrfiles.com/ugd/ecec20_eaa936cb76834d2aa6ba2599e76d50f1.pdf
    • https://static.usrfiles.com/ugd/b8c837_fafa41c826854254940890c10bed8360.pdf
    • https://static.usrfiles.com/ugd/b8c837_c773afb0a1c040b3abcb07471c7f7c08.pdf
    • https://static.usrfiles.com/ugd/b8c837_4d449b3996d6457399ee79d7ab0a118c.pdf
    • https://static.usrfiles.com/ugd/b8c837_48f1ac0621084e2fa3e0a556ab16f75d.pdf
    • https://static.usrfiles.com/ugd/5be868_b04f35b4b2ae48c5a3f7df4cd2382817.pdf
    • https://static.usrfiles.com/ugd/87a178_18cd6e21178446f99251c5bd0320f7e3.pdf
    • https://cdn.shopify.com/s/files/1/0434/1504/4254/files/l_d_c_ka_full_form.pdf
    • https://cdn.shopify.com/s/files/1/0448/3982/9661/files/alejandro_casona_obras.pdf
    • https://cdn.shopify.com/s/files/1/0440/4989/1478/files/concept_of_sovereignty_in_political_science.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pedarivorenali.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006313.bin
317cf67eae4a0783ddb17b9a891a852b3e84f28fab291839e0062d0fed2145a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6313 5456 bytes
font_01_sfnt_off0000758a.bin
426ce154bfba7682c602f0b06ae8acc2fdcd80112d2c8b93e7cecc9bc74c5ef7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x758A 10176 bytes
font_02_sfnt_off0000985c.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x985C 4324 bytes

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