Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ccb48ad8402c38d…

MALICIOUS

PDF

45.6 KB Created: 2020-08-08 11:14:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cdec7f5b155d8f86e05014e3512c4c97 SHA-1: 657197b81402a0223ed73a91a3e572f06b2c424b SHA-256: 4ccb48ad8402c38dd8219b803fa1c2d72e067a8c697f5d0baaf04b34e0a92c5a
152 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=movimiento+rectilineo+uniforme+variado+pdf'. This indicates the document's primary purpose is to lure users to a malicious site. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO manipulation tactic to distribute the malicious content. No scripts were extracted from this sample, but the embedded URLs and the redirector link are strong indicators 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=movimiento+rectilineo+uniforme+variado+pdf
    • http://files.emerierosephotography.com/uploads/1/3/0/9/130969352/semusaluri.pdf
    • http://files.maidtoshineservices.net/uploads/1/3/1/4/131437268/29f33e.pdf
    • http://ribexepud.britishrecordshoparchive.org/uploads/1/3/1/6/131637136/4245272.pdf
    • http://files.demesstainedglass.com/uploads/1/3/0/7/130739450/de480.pdf
    • http://files.angeldesignsbyjane.com/uploads/1/3/2/6/132681880/vuwowasit-lazata-pubon.pdf
    • https://cdn.shopify.com/s/files/1/0440/5392/1957/files/29519840533.pdf
    • https://cdn.shopify.com/s/files/1/0434/2143/4005/files/scaled_agile_framework_4._5.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97098861098.pdf
    • https://cdn.shopify.com/s/files/1/0431/9651/4461/files/brche_division_aufgaben.pdf
    • https://cdn.shopify.com/s/files/1/0432/2767/6829/files/18722332260.pdf
    • https://cdn.shopify.com/s/files/1/0430/9758/7861/files/62307579742.pdf
    • https://cdn.shopify.com/s/files/1/0432/4143/9400/files/1333190877.pdf
    • https://cdn.shopify.com/s/files/1/0429/2627/6775/files/gesojen.pdf
    • https://cdn.shopify.com/s/files/1/0433/3430/3912/files/liguzan.pdf
    • https://cdn.shopify.com/s/files/1/0431/7138/1405/files/guwewopi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7360/0678/files/kebagamux.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6514/files/febigenejexuginerewerejov.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_off0000657f.bin
18392b9230999044373794b6c998625aef63e384eb37dd930b5dbe137fd22430		 pdf-font-stream PDF embedded font (sfnt) at offset 0x657F 5188 bytes
font_01_sfnt_off00007726.bin
8733195ddb2c60ec03c2baa12e0c1f520741c029ed38b77bb7a8c18304880aa4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7726 16240 bytes

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