Malicious PDF — malware analysis report

Static analysis result for SHA-256 16987f61b3835783…

MALICIOUS

PDF

57.1 KB Created: 2020-07-29 04:24:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74baa1104aebe615d9ce5ec28fe83dd4 SHA-1: f127177c041a91131b6320ccc7d46dee0d0ec420 SHA-256: 16987f61b3835783aca84e1d3aa96869fe455c291785ac47ed16459d77070edd
194 Risk Score

Malware Insights

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

The PDF contains a lure related to payment reconciliation, combined with heuristics indicating a malicious redirector link and a link farm. The primary malicious URL, 'https://ttraff.com/pify?keyword=cash+reconciliation+sheet+template', is likely used to redirect the user to a phishing or malware site. The presence of numerous external PDF links suggests an attempt to manipulate search engine rankings 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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/pify?keyword=cash+reconciliation+sheet+template
    • http://files.pageantdoll.com/uploads/1/3/0/8/130813458/xizovuwu.pdf
    • http://files.blaskapelle-milwaukee.com/uploads/1/3/1/4/131438423/6363580.pdf
    • http://files.urfavoritehooker.com/uploads/1/3/1/0/131070911/nixisuj.pdf
    • http://files.courtneyamaro.com/uploads/1/3/1/8/131856277/bawitagol.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0084/7781/files/vamumiromuxokime.pdf
    • https://cdn.shopify.com/s/files/1/0430/5725/0455/files/22041562559.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/99443985191.pdf
    • https://cdn.shopify.com/s/files/1/0437/2935/4903/files/fimawe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kosetomamevisired.pdf
    • https://cdn.shopify.com/s/files/1/0433/9145/1294/files/35865477770.pdf
    • https://cdn.shopify.com/s/files/1/0431/0718/8898/files/safajovibasurotijubimukez.pdf
    • https://cdn.shopify.com/s/files/1/0434/2651/3048/files/mofutepi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1044/0862/files/19731098801.pdf
    • https://cdn.shopify.com/s/files/1/0431/4189/0208/files/31560064753.pdf
    • https://cdn.shopify.com/s/files/1/0435/9726/7112/files/16386643904.pdf
    • https://cdn.shopify.com/s/files/1/0435/2396/5079/files/jazupiduvesijakukuzituv.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_off0000a3ba.bin
6c43cddd13a7c0e7a9992b49c96c62a48d007cae5797c032b1a51bfc8bb7d8c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3BA 4984 bytes
font_01_sfnt_off0000b473.bin
7fb88dee3934fa932d55a922e3d04e6f584e10ab0ce56371172fcb9e9bc1ae54		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB473 10388 bytes

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