Malicious PDF — malware analysis report

Static analysis result for SHA-256 3158384c4b5f63ad…

MALICIOUS

PDF

41.6 KB Created: 2020-08-30 12:53:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 375baed11ca235aba88b3c5a3688b86c SHA-1: d03e07796879d9c0280aeca8b8b5bf225225bcd6 SHA-256: 3158384c4b5f63ade509dafe8fd2b4955781736fcefcb9a1674cfe2440fa732f
152 Risk Score

Malware Insights

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

This PDF file functions as a link farm, embedding numerous links to other PDF documents hosted on Shopify. One of these links, https://ttraff.cc/wix?keyword=nicole+brown+simpson+the+private+dia, redirects to known malicious infrastructure. The presence of a large number of external links, combined with the malicious redirector, indicates a likely attempt to lure users to harmful 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/wix?keyword=nicole+brown+simpson+the+private+dia
    • https://cdn.shopify.com/s/files/1/0438/1566/5826/files/coffee_shop_business_plan_philippines.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/wemem.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8099/files/magisterium_2_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0434/1412/6759/files/pompeii_bastille_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/37770013011.pdf
    • https://cdn.shopify.com/s/files/1/0430/8415/2986/files/rsync_progress_bar.pdf
    • https://cdn.shopify.com/s/files/1/0429/4885/3926/files/wufeke.pdf
    • https://cdn.shopify.com/s/files/1/0434/1553/5774/files/surat_al_waqiah_arab_latin_dan_terjemahannya.pdf
    • https://cdn.shopify.com/s/files/1/0438/2185/8973/files/28385262219.pdf
    • https://cdn.shopify.com/s/files/1/0431/3006/0955/files/87083300818.pdf
    • https://cdn.shopify.com/s/files/1/0440/6539/0757/files/39528960990.pdf
    • https://cdn.shopify.com/s/files/1/0435/9405/5843/files/sw_airlines_check_in.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/5670493421.pdf
    • https://cdn.shopify.com/s/files/1/0432/8646/2620/files/tizexad.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_off00006361.bin
4e5ede6f99257885c1ca4400ece26f7330715a920d4e244120dbc45b3758aadf
pdf-font-stream PDF embedded font (sfnt) at offset 0x6361 5576 bytes
font_01_sfnt_off0000762a.bin
8729b27efbad5fea00e4ad0dc2d48bc3b9c153372b839dd309702a888a304af4
pdf-font-stream PDF embedded font (sfnt) at offset 0x762A 10304 bytes