Malicious PDF — malware analysis report

Static analysis result for SHA-256 38f7d9edc1d59c53…

MALICIOUS

PDF

49.1 KB Created: 2020-08-10 21:21:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dfcc1878e919af7dae8fe6692a35cf37 SHA-1: 238cf5d09f50afe29c03794a1833e0b45a784aac SHA-256: 38f7d9edc1d59c533276d946f1aee2410c23c21a6c70e68f9ccffe2032cce83f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=properties+of+antigen+and+antibody+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The presence of a large number of external PDF links, many hosted on cdn.shopify.com, suggests a link farm or SEO poisoning tactic to increase visibility. No scripts were extracted, but the malicious redirector is a high-confidence indicator of a phishing or scam attempt.

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.cc/pify?keyword=properties+of+antigen+and+antibody+pdf
    • http://files.stsarkis.org/uploads/1/3/1/3/131380814/3c9c40.pdf
    • http://files.centralok.usafachapters.org/uploads/1/3/2/8/132814305/kakujamorapib-webegif.pdf
    • http://files.chsboosters.net/uploads/1/3/0/8/130814411/kibejewun.pdf
    • http://gokovo.rosevillacookieco.com/uploads/1/3/1/1/131164250/5ec90.pdf
    • http://files.inspirationastudio.com/uploads/1/3/0/9/130969511/vemiwim.pdf
    • https://cdn.shopify
    • https://cdn.shopify.com/s/files/1/0434/4116/0344/files/mapaxi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8203/1007/files/47409825429.pdf
    • https://cdn.shopify.com/s/files/1/0431/9500/7137/files/3501440730.pdf
    • https://cdn.shopify.com/s/files/1/0428/4294/7751/files/pan_application_form_fillable.pdf
    • https://cdn.shopify.com/s/files/1/0429/4131/7276/files/dixofawasamarugakuviwobef.pdf
    • https://cdn.shopify.com/s/files/1/0429/4960/7590/files/14563408711.pdf
    • https://cdn.shopify.com/s/files/1/0428/5395/7799/files/zezaboderuselexoxikow.pdf
    • https://cdn.shopify.com/s/files/1/0431/2249/1553/files/wutaruxakulizivusidad.pdf
    • https://cdn.shopify.com/s/files/1/0438/6747/2037/files/45001004398.pdf
    • https://cdn.shopify.com/s/files/1/0432/8911/6840/files/angina_inestable_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0433/9430/2117/files/tukerajodidodomewepeka.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_off000082a8.bin
7e6ad105ad899c398129e7cd1e9e56d5c88a52a10da2c80845da97c6d8101d46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82A8 5420 bytes
font_01_sfnt_off0000951c.bin
95b6f9dfe9f0a386c2030260f52629f96fd372dae78cf7e3643839fd990a97cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x951C 10104 bytes

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