Malicious PDF — malware analysis report

Static analysis result for SHA-256 11c351e002530f9c…

MALICIOUS

PDF

44.7 KB Created: 2020-08-10 15:27:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90b342eb55129010aefbd9165be9ba6a SHA-1: c214c3eba94360740cd3dd1d48c383c423d114d6 SHA-256: 11c351e002530f9c225b4aed89495d24e452cf9e93d17f9b5cd521869b3ea8d9
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious redirectors or benign-looking files hosted on Shopify. The primary malicious URL identified is `https://ttraff.cc/pify?keyword=beers+criteria+list+pdf`, which is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains this URL and other links, suggesting a phishing or content-luring attempt. No scripts were extracted, but the presence of numerous external links and the malicious redirector strongly indicate a malicious intent to redirect the user to harmful 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.cc/pify?keyword=beers+criteria+list+pdf
    • http://files.myvbbc.org/uploads/1/3/0/7/130738719/db0f89b14.pdf
    • http://pufipivat.atlconf.org/uploads/1/3/1/4/131437812/bitarab_duwozewoga_lakapipev_sulizemerexe.pdf
    • http://files.ambcircleoffriends.com/uploads/1/3/1/4/131482916/3554244.pdf
    • http://files.sunrisechiropracticcenter.net/uploads/1/3/1/4/131453574/6273303.pdf
    • http://files.grottocreations.com/uploads/1/3/1/1/131163684/8665499.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/5394/6782/files/trumpet_jazz_music.pdf
    • https://cdn.shopify.com/s/files/1/0430/2353/2195/files/38397121983.pdf
    • https://cdn.shopify.com/s/files/1/0428/6123/2294/files/xeruguwobudebubikidonax.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86399573169.pdf
    • https://cdn.shopify.com/s/files/1/0434/1583/0695/files/pijularezeni.pdf
    • https://cdn.shopify.com/s/files/1/0431/0263/4148/files/joxevisu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7513/3859/files/rulisoxivexajojalefuri.pdf
    • https://cdn.shopify.com/s/files/1/0432/3885/0724/files/exercice_d_orthographe_cm2.pdf
    • https://cdn.shopify.com/s/files/1/0437/8905/8206/files/lukekekugomigero.pdf
    • https://cdn.shopify.com/s/files/1/0430/0632/8995/files/37490466841.pdf
    • https://cdn.shopify.com/s/files/1/0434/2897/0652/files/armchair_general.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_off00007086.bin
fd0854e015d4ae270cbd5b8a1c3763fc4903436dad03e9f963ff9f29cfaef43e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7086 5200 bytes
font_01_sfnt_off00008242.bin
5f58c7bd6ffc09747d21efe1c6c5160dbf76284837b245213ff71932f6363696		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8242 10576 bytes

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