Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f8b19fa9bea5cf8…

MALICIOUS

PDF

37.7 KB Created: 2020-08-08 10:43:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: afbcb085954c88a3a44bb75e3cd57793 SHA-1: 7db9c62bc48f157dbbe3dd8df2bde7b31b1641fc SHA-256: 0f8b19fa9bea5cf82a96175a17ef141def41791d327811ddc6456f9c70d53565
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically `https://ttraff.cc/pify?keyword=barefoot+investor+for+families+free+pdf`. This URL is part of a link farm designed to distribute malicious content. The document body, though heavily obfuscated, also contains this URL, indicating an attempt to trick users into downloading further malicious content.

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=barefoot+investor+for+families+free+pdf
    • http://files.redemptioneveryday.com/uploads/1/3/2/7/132740399/0a6f369dbc.pdf
    • http://files.thebookthateveryoneshouldhave.com/uploads/1/3/1/4/131454373/7321702.pdf
    • http://files.seventhdaybaptist.ca/uploads/1/3/1/4/131483491/28b785d521.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/7679/7081/files/57928596761.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vinufew.pdf
    • https://cdn.shopify.com/s/files/1/0447/8546/7558/files/apartment_lease.pdf
    • https://cdn.shopify.com/s/files/1/0433/6523/6886/files/80731545342.pdf
    • https://cdn.shopify.com/s/files/1/0429/7018/5879/files/larynx_anatomy.pdf
    • https://cdn.shopify.com/s/files/1/0428/6716/3302/files/jipilu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6315/6642/files/alcohol_abuse_articles.pdf
    • https://cdn.shopify.com/s/files/1/0434/9224/5666/files/the_rock_cycle_steps.pdf
    • https://cdn.shopify.com/s/files/1/0430/3532/8663/files/wabadawumuxulanufavoxeliw.pdf
    • https://cdn.shopify.com/s/files/1/0428/8951/1071/files/54522786199.pdf
    • https://cdn.shopify.com/s/files/1/0437/7139/6257/files/pioneer_rt_909_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/6640/9638/files/36559402001.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_off00005618.bin
3fec5fb7162cf565e45530f19e044427b12b6c29a5c2fba2696aa2d9828fa6be
pdf-font-stream PDF embedded font (sfnt) at offset 0x5618 5296 bytes
font_01_sfnt_off0000680d.bin
9593a9fd484236dd3947fd8f2d80b8e3d3266be815ba58ddaf8f52fe3139c08d
pdf-font-stream PDF embedded font (sfnt) at offset 0x680D 9960 bytes