Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5a22b6a3294ac38…

MALICIOUS

PDF

38.6 KB Created: 2020-08-21 08:09:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a6fe1b0fc8b535aabdfc525c5e61346 SHA-1: 026c9874686301e79b9b3ea26b345277d20e9794 SHA-256: e5a22b6a3294ac38017664c01a03518a1b2f5293bf82a947b801011d846ec471
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, designed to appear as legitimate book downloads. One critical heuristic identified a link to a known malicious redirector, https://ttraff.cc/pify?keyword=libro+de+los+annunakis+pdf, indicating a phishing or malware distribution attempt. The ML classifier strongly supports the malicious nature of this PDF.

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=libro+de+los+annunakis+pdf
    • http://files.vayaocandles.com/uploads/1/3/1/4/131482952/lunivelowiser.pdf
    • https://cdn.shopify.com/s/files/1/0434/3640/8982/files/ralego.pdf
    • https://cdn.shopify.com/s/files/1/0429/0517/4179/files/fitogizokijofoxusotufir.pdf
    • https://cdn.shopify.com/s/files/1/0431/7223/3380/files/sonyvegas_pro_8._0.pdf
    • https://cdn.shopify.com/s/files/1/0430/3713/0914/files/kifijobatapowupokakok.pdf
    • https://cdn.shopify.com/s/files/1/0428/5507/1900/files/agenda_2020_online.pdf
    • https://cdn.shopify.com/s/files/1/0429/7831/2355/files/introduction_to_statistical_learning_seventh.pdf
    • https://cdn.shopify.com/s/files/1/0435/6482/6783/files/equidad_social.pdf
    • https://cdn.shopify.com/s/files/1/0429/8945/3473/files/85568568806.pdf
    • https://cdn.shopify.com/s/files/1/0435/0800/7072/files/gadisemajejanumita.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/95181885481.pdf
    • https://cdn.shopify.com/s/files/1/0431/9952/9120/files/zekebunopiruzidolivula.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_off0000578b.bin
ae0344259e454aa0b5fad83725de7e4f3b30f8966bd92adf33d4e62b24e88ae9
pdf-font-stream PDF embedded font (sfnt) at offset 0x578B 5180 bytes
font_01_sfnt_off00006931.bin
84070172ccbfd3bde13508f79d8089e4293807475d9aa81bd927159483b71c8d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6931 11216 bytes