Malicious PDF — malware analysis report

Static analysis result for SHA-256 8590191c14c4411e…

MALICIOUS

PDF

42.9 KB Created: 2020-08-19 10:07:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2cfc4d54bb208e264e69e9062e57aec1 SHA-1: d25ce2e6a09bf7e663026c2829b3f8156349fbaf SHA-256: 8590191c14c4411ec0db21324e0045d15f2344691527ed27c2451ff85ae86b91
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised with text suggesting an iPhone notification. This indicates a phishing or scam attempt, likely to lead the user to a malicious site. The PDF also hosts a large number of external links, suggesting it's part of a link farm designed to improve SEO for malicious content.

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=iphone+message+answered+on+another+device
    • http://files.deltafireprotection.com/uploads/1/3/0/9/130969003/381601.pdf
    • http://files.movimientomexicano2018.org/uploads/1/3/2/3/132302939/498eac1358.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/3333/7768/files/1305960408.pdf
    • https://cdn.shopify.com/s/files/1/0427/7387/2807/files/jurun.pdf
    • https://cdn.shopify.com/s/files/1/0435/5633/9871/files/74269575559.pdf
    • https://cdn.shopify.com/s/files/1/0447/3287/4901/files/agilent_33220a_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/6287/6565/files/wogizawezanenabiga.pdf
    • https://cdn.shopify.com/s/files/1/0431/7220/0608/files/xemepefixokuvajezateg.pdf
    • https://cdn.shopify.com/s/files/1/0431/2544/0669/files/45610808399.pdf
    • https://cdn.shopify.com/s/files/1/0433/9784/1054/files/giranofipukupexutapumalik.pdf
    • https://cdn.shopify.com/s/files/1/0452/4458/0002/files/argas_persicus.pdf
    • https://cdn.shopify.com/s/files/1/0434/3060/9063/files/capablanca_endgame_book.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b0c.bin
85efac910c1b67c48a207b5a15613b180a3f1f5230927536125fb0f4a4fbaf35
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B0C 5332 bytes
font_01_sfnt_off00006d0a.bin
96c110c3153b86446479fd644ebd915bbcf6dcb4bf64482e9b9208390b6bccbc
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D0A 10528 bytes
font_02_sfnt_off000090ae.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x90AE 4324 bytes