Malicious PDF — malware analysis report

Static analysis result for SHA-256 ced1f2ed5c33439e…

MALICIOUS

PDF

40.0 KB Created: 2020-08-15 05:22:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df95a9b78ab4c0a050302a6aebef9d3d SHA-1: e8bf979c1b2842ae304c078fd3855a7073a4cf0a SHA-256: ced1f2ed5c33439e5c556b608f20d335902c6a9ebb6fde5e13d95d5b9e0b84d8
154 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Alter ego 1 french book free' and the malicious URL, suggesting a lure for users interested in free content. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is designed to redirect users to harmful infrastructure.

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=alter+ego+1+french+book+free
    • http://files.digi-kits.com/uploads/1/3/0/8/130815026/rupilamawe_jegarigodule.pdf
    • http://files.jamstheatrecompany.com/uploads/1/3/1/8/131871705/faxukolomipujenatoje.pdf
    • http://files.seniors-who-care.com/uploads/1/3/0/8/130814234/xeremopewodusavigu.pdf
    • http://files.lytlebitartistic.com/uploads/1/3/0/9/130968947/xemerafanuvaxusi.pdf
    • http://mopomopuw.erincmilhem.com/uploads/1/3/0/7/130775432/vobofuvatemo.pdf
    • https://cdn.shopify.com/s/files/1/0429/2011/6380/files/wemupopefupizimup.pdf
    • https://cdn.shopify.com/s/files/1/0432/3636/0351/files/vernier_caliper_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0431/1567/5815/files/dotties_weight_loss_zone.pdf
    • https://cdn.shopify.com/s/files/1/0438/6432/6299/files/98713789597.pdf
    • https://cdn.shopify.com/s/files/1/0437/7857/2450/files/38731213020.pdf
    • https://cdn.shopify.com/s/files/1/0435/5643/8165/files/77157226368.pdf
    • https://cdn.shopify.com/s/files/1/0431/3733/5464/files/xokajulovuvafove.pdf
    • https://cdn.shopify.com/s/files/1/0432/6939/0500/files/40843480860.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90067119925.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_off00006009.bin
65ef6efea53383f6b87bd1915724a4936c69be26563faeac71d68d033f5557d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6009 5000 bytes
font_01_sfnt_off00007113.bin
e172be5418953b075bfe5084ce46bcb96f612b6398a926454666ed102448be25
pdf-font-stream PDF embedded font (sfnt) at offset 0x7113 10024 bytes