Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a5e0eec00d60a24…

MALICIOUS

PDF

45.5 KB Created: 2020-08-23 21:53:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f11e72d56e1bf32b751b71edb2072b42 SHA-1: 7537368c1bacc7c3a29c80bbb5cf85a700cfdab5 SHA-256: 5a5e0eec00d60a248a1b01b53a907ebaa8cbd93e8fc9fae63c8adebd96be3d78
234 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to a link farm designed to generate traffic and potentially lead users to malicious content. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=android+intent+browser+local+file'. The document body, though heavily obfuscated, contains references to this URL and other PDF links, consistent with an advance-fee scam lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=android+intent+browser+local+file
    • http://files.premierbeachpropertymanagement.com/uploads/1/3/1/0/131070178/23232010aa63.pdf
    • http://jazok.southerncotons.com/uploads/1/3/1/1/131164250/ac29a.pdf
    • http://files.pantagespens.com/uploads/1/3/2/6/132682039/3172094.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0446/6167/0051/files/dexametasona_antiemetico.pdf
    • https://cdn.shopify.com/s/files/1/0430/8241/6281/files/mixajijejakapabepuloxax.pdf
    • https://cdn.shopify.com/s/files/1/0430/0098/7801/files/english_to_spanish_dictionary_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/6191/1460/files/lusomine.pdf
    • https://cdn.shopify.com/s/files/1/0437/5874/7800/files/intermediate_cuneiform_fracture_icd_10.pdf
    • https://cdn.shopify.com/s/files/1/0431/5018/0503/files/33764536876.pdf
    • https://cdn.shopify.com/s/files/1/0432/8089/2057/files/45005760149.pdf
    • https://cdn.shopify.com/s/files/1/0427/8986/3580/files/14523857797.pdf
    • https://cdn.shopify.com/s/files/1/0433/8624/1187/files/92007606555.pdf
    • https://cdn.shopify.com/s/files/1/0432/2479/3245/files/cdma_technology_in_mobile_communication.pdf
    • https://cdn.shopify.com/s/files/1/0430/0544/4259/files/verbal_bullying_research.pdf
    • https://cdn.shopify.com/s/files/1/0432/2073/0011/files/26444136735.pdf
    • https://cdn.shopify.com/s/files/1/0438/4797/5062/files/bunodomu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/puneson.pdf
    • https://cdn.shopify.com/s/files/1/0433/6589/2246/files/66221061820.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_off000071f7.bin
608652e0d81bb72e0a06ebb14ce0dabcfd8bab4b1cc60fff162a730fb32c92b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71F7 5236 bytes
font_01_sfnt_off000083df.bin
38c4eafa6bbb46c1e5385eb8eec57c898b999da01f9ef027a1e4446b198e2fe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83DF 10856 bytes

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