Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fd1dff82fbfa775…

MALICIOUS

PDF

39.1 KB Created: 2020-09-06 08:44:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7500f2b0784e3c815e5bdc5727780066 SHA-1: b8508a2447e95182afd1bf59ba97085c56e8d2ac SHA-256: 0fd1dff82fbfa7751900a2a1b0be11071a2e156dd20339829f32c443801a7660
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.me/wix?keyword=mheonline+answers+key+volume+1', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is an 'answer key', likely a lure to encourage clicks. The presence of numerous Shopify links, while many are benign, contributes to a link farm pattern, indicating a potential SEO manipulation or distribution strategy.

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.me/wix?keyword=mheonline+answers+key+volume+1
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9495/0556/files/89641698220.pdf
    • https://cdn.shopify.com/s/files/1/0438/6678/3899/files/nutukamavotis.pdf
    • https://cdn.shopify.com/s/files/1/0428/6382/0959/files/consent_to_medical_treatment_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/3710/6087/files/nikulakifenivejefuwo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4690/3709/files/sonezakupasesebisasu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0130/6526/files/cookie_clicker_editor.pdf
    • https://cdn.shopify.com/s/files/1/0430/8323/5489/files/42824267767.pdf
    • https://cdn.shopify.com/s/files/1/0428/3950/7100/files/tilezixi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5280/1954/files/godupujojabowam.pdf
    • https://cdn.shopify.com/s/files/1/0429/1959/2102/files/29314498179.pdf
    • https://cdn.shopify.com/s/files/1/0432/7351/9269/files/avengers_theme_piano_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6505/files/7541126288.pdf
    • https://cdn.shopify.com/s/files/1/0443/0469/5452/files/el_escepticismo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0657/4240/files/15198997580.pdf
    • https://static.usrfiles.com/ugd/f523c3_8b3ec11f60074de0a0cfe6404c3dca3c.pdf
    • https://static.usrfiles.com/ugd/b8c837_4a8e8b88ce3f42ecaa4fc7149577fd9a.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_off00005aed.bin
47b37c776b58b3b657408cdf0e1f745762a3a7a08f644fdbc1a5e81138452280		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AED 5300 bytes
font_01_sfnt_off00006cf2.bin
31c4eb109567bb0d4f91720f9bc895011fc87891f098618c57b7e4e67f6c020e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF2 10260 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.