Malicious PDF — malware analysis report

Static analysis result for SHA-256 d935d40323ecf99b…

MALICIOUS

PDF

32.7 KB Created: 2020-08-18 19:05:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c47c35f0f5fdd0741592185e306997e SHA-1: aa6bf44f0de1e451dfe2e8bcd3e4e1c50d0088c9 SHA-256: d935d40323ecf99b29be45217bbd770fcc4da947b1d974ed9294038f0fb7e41f
152 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download for "new bollywood songs audio 2017". The document body and embedded URLs strongly suggest a phishing or social engineering attempt to redirect the user to malicious infrastructure. The primary malicious IOC is the ttraff.ru redirector.

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=new+bollywood+songs+audio++2017
    • http://gezam.reignbowco.com/uploads/1/3/2/7/132740541/4704024.pdf
    • http://files.haralsoncountyhistory.com/uploads/1/3/2/3/132302913/4438840.pdf
    • https://cdn.shopify.com/s/files/1/0434/8834/6262/files/39523755148.pdf
    • https://cdn.shopify.com/s/files/1/0435/5004/8419/files/notukaninapodizaladesijo.pdf
    • https://cdn.shopify.com/s/files/1/0450/7313/7827/files/vatolesevukajuriru.pdf
    • https://cdn.shopify.com/s/files/1/0431/6528/6564/files/capone_n_noreaga_the_war_report_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0429/7487/1711/files/naming_alkanes_practice.pdf
    • https://cdn.shopify.com/s/files/1/0437/0631/9001/files/the_masorah_of_biblia_hebraica_stuttgartensia.pdf
    • https://cdn.shopify.com/s/files/1/0433/6254/9910/files/kapigerekuta.pdf
    • https://cdn.shopify.com/s/files/1/0435/0482/8580/files/63077298738.pdf
    • https://cdn.shopify.com/s/files/1/0427/3196/2535/files/tonight_enrique_iglesias.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000406a.bin
319dcc31d7a7513b553ef996db9725530b0b82ebfedf168404c3462cf12504cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x406A 5608 bytes
font_01_sfnt_off000053b0.bin
00fe61e15e431c5f6db4bc39332eb2c6d898f52cb602ff53055981417a4b5800		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53B0 10164 bytes

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