Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6e569a8f85508a1…

MALICIOUS

PDF

53.1 KB Created: 2020-08-08 18:07:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f97b749d952d8725a811a6feb2d43d8e SHA-1: d9096719c334315f3e2dbc052ee0cba8239b454c SHA-256: d6e569a8f85508a1b9ad9944ba116b49c334a4a01c0604a2cd944972c7b8694a
152 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to Shopify domains, but one critical link redirects to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL, suggesting the primary intent is to trick the user into clicking the link for a purported PDF download, leading them to malicious infrastructure.

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=chakra+healing+for+beginners+pdf
    • http://sonuludur.professionaltalker.com/uploads/1/3/0/8/130873995/pevusopijox-kuwuvu.pdf
    • http://files.leopardpineapple.com/uploads/1/3/0/8/130873945/2309324059d36.pdf
    • http://files.gogovernors.com/uploads/1/3/1/4/131406762/6528224.pdf
    • http://files.patiencereformed.com/uploads/1/3/0/7/130776592/zofimosowoj_gomus_lejimikego.pdf
    • http://files.westside-video.com/uploads/1/3/2/7/132740445/2026221.pdf
    • https://cdn.shopify.com/s/files/1/0427/6604/1244/files/36756123681.pdf
    • https://cdn.shopify.com/s/files/1/0435/5063/8241/files/turning_tables_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0431/3245/3030/files/1000_most_common_words_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0427/8406/3654/files/bioethanol_production_from_lignocellulosic_biomass.pdf
    • https://cdn.shopify.com/s/files/1/0428/7827/1641/files/rinajafes.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0144/files/xozip.pdf
    • https://cdn.shopify.com/s/files/1/0427/9628/6111/files/kinubekojuwubawi.pdf
    • https://cdn.shopify.com/s/files/1/0440/0267/2798/files/38480282581.pdf
    • https://cdn.shopify.com/s/files/1/0433/2358/8773/files/sibebesukokut.pdf
    • https://cdn.shopify.com/s/files/1/0431/7098/8196/files/jojosagu.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_off00009361.bin
f9e9ddcd3a7cf35ed806dfbeadee8037badbb9295b2137d4e43235b4b23d99fe
pdf-font-stream PDF embedded font (sfnt) at offset 0x9361 5412 bytes
font_01_sfnt_off0000a5b8.bin
ad20d175a0ef71bdbb3f38890f790bc854dc0f47999493af469ef5a1f88406d1
pdf-font-stream PDF embedded font (sfnt) at offset 0xA5B8 9804 bytes