Malicious PDF — malware analysis report

Static analysis result for SHA-256 38ead334ca40c84e…

MALICIOUS

PDF

34.9 KB Created: 2020-08-26 20:18:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5f22c8e83bc3481c158d7399ea486f3 SHA-1: b413c62a5a08c11ea3ee13f711dd3f944f744d10 SHA-256: 38ead334ca40c84e91aa35f0cb2878cf6ef4e046560d835baab48a1a81d950e0
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link redirects to 'ttraff.com', a known malicious redirector. The document body, though heavily obfuscated, contains text related to watching a TV show, likely a lure to encourage clicks on the embedded links. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector confirms a phishing or redirection attack.

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.com/pify?keyword=watch+survivor%2527+s+remorse+online+free
    • http://files.sonjaportfolio.ca/uploads/1/3/1/4/131437246/3e06238ac7580.pdf
    • http://loruni.realmilklexington.com/uploads/1/3/1/6/131637041/199494.pdf
    • http://basib.kellycurtisphoto.com/uploads/1/3/1/4/131454024/pezolosaxebobe-pudojuwogozo.pdf
    • https://cdn.shopify.com/s/files/1/0437/9944/5661/files/base_de_datos_mysql_ejemplo.pdf
    • https://cdn.shopify.com/s/files/1/0435/1921/3727/files/73633593850.pdf
    • https://cdn.shopify.com/s/files/1/0435/3140/3413/files/beehive_book_class_9.pdf
    • https://cdn.shopify.com/s/files/1/0432/7132/3808/files/chinese_english_medical_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0435/4605/0728/files/24667145897.pdf
    • https://cdn.shopify.com/s/files/1/0430/9227/9460/files/ethiopian_physics_textbook_grade_11.pdf
    • https://cdn.shopify.com/s/files/1/0432/1764/9819/files/soundcloud_er_chrome_extension.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sujaxitedidubabupopivup.pdf
    • https://cdn.shopify.com/s/files/1/0430/3260/8921/files/2363753273.pdf
    • https://cdn.shopify.com/s/files/1/0437/1103/7589/files/54848804205.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/android_9_tablet_split_screen.pdf
    • https://cdn.shopify.com/s/files/1/0433/6405/7238/files/nerugakejexobi.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_off00004987.bin
4ddd91e485d06a00ad1e27f4ea21b540549f4df7ee7b39b1e1ea5e8d2b8a0e68
pdf-font-stream PDF embedded font (sfnt) at offset 0x4987 5228 bytes
font_01_sfnt_off00005b45.bin
7c516b3657b8b68a20e335f466aea7f75db388c73103a0c8a84a1c8c9f07ba63
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B45 10528 bytes