Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eca6359b00b4927…

MALICIOUS

PDF

47.2 KB Created: 2020-07-17 04:37:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-07
MD5: da032a28f9a13eac014a0bfabe763283 SHA-1: c9460905dbf32a165c204acff8061e03984e2f23 SHA-256: 7eca6359b00b492756767dd18c0b25f9cd564b708b8d813fcc6e80edbae0a3f3
194 Risk Score

Malware Insights

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

The PDF contains numerous links designed to appear as 'inspirational stories books pdf' but redirect to malicious infrastructure, specifically the ttraff.ru domain. This indicates a phishing or scam attempt, likely using the document as a lure to drive traffic to a malicious site. No scripts were extracted, but the presence of embedded URLs and the ML classifier's high confidence suggest malicious intent.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/wb?keyword=inspirational%20stories%20books%20pdf In PDF document text
    • http://files.wedgwoodsci.com/uploads/1/3/0/7/130775942/nebasanemawalu.pdfIn PDF document text
    • http://files.admcclub.com/uploads/1/3/1/4/131453990/2596476.pdfIn PDF document text
    • http://files.cockndragon.com/uploads/1/3/1/3/131381802/fawapunufogoj-padomaj-rudamol.pdfIn PDF document text
    • http://files.davemounsey.com/uploads/1/3/1/8/131871980/vojezujovef.pdfIn PDF document text
    • http://files.studyingdaily.com/uploads/1/3/1/6/131606782/wuvokelogajazop_dikibumuril.pdfIn PDF document text
    • http://files.isroflakelanier.com/uploads/1/3/1/0/131070355/93b1d7835395b0.pdfIn PDF document text
    • http://files.communityartistsgallery.org/uploads/1/3/1/6/131606594/80d77.pdfIn PDF document text
    • http://files.jrmccormack.com/uploads/1/3/0/7/130739740/tepijupaludom_junomif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://kegitemowe.files.wordpress.com/2020/06/zugewudanani.pdfIn PDF document text
    • https://kiwuzuk.files.wordpress.com/2020/06/megoxul.pdfIn PDF document text
    • https://fijurabowo.files.wordpress.com/2020/07/85117010330.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4560/0936/files/xorivixofe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mirizopenifipometetotagoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8165/4691/files/71868926492.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7188/9815/files/daxev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3551/7337/files/29750930307.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/71299233386.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2359/6693/files/ditumawomazojusepow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5513/7447/files/xutowilefuvitum.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007bf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BF0 4964 bytes
SHA-256: efce3d55160f0403a1c438ac46a20b87d3d86a2fd64763be2aa153e4729302d6
font_01_sfnt_off00008cc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CC7 10136 bytes
SHA-256: 5ac8d53a960cd3556fb4467641f38ec31f682a2be8f731150661ff7790a33ab3