Malicious PDF — malware analysis report

Static analysis result for SHA-256 7068f6ec783d333a…

MALICIOUS

PDF

40.6 KB Created: 2020-08-27 19:23:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f84c3f42058af4048c0496376059d9a2 SHA-1: 424ca664afb878a7c2917fec4dfd5d3ae709ebc3 SHA-256: 7068f6ec783d333a27a663514ab239ff536df2cd904c63de0d98e1efb6946150
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a mass of external links, including a redirector URL disguised as a Sims 4 mod download. This suggests a phishing or scam attempt designed to drive traffic to malicious infrastructure. The ML classifier also strongly indicated maliciousness.

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=sims+4+coolspear1+mods
    • http://files.ontherealfilm.com/uploads/1/3/0/7/130775143/dotuviwovukiriz-winudijoba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8208/7588/files/batuwuwenujovudowokixukes.pdf
    • https://cdn.shopify.com/s/files/1/0437/9112/2584/files/fitter_happier_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89647405972.pdf
    • https://cdn.shopify.com/s/files/1/0428/0185/6668/files/campbell_biology_11th_test_bank.pdf
    • https://cdn.shopify.com/s/files/1/0435/5863/3631/files/41089370790.pdf
    • https://cdn.shopify.com/s/files/1/0438/2218/6656/files/bse_odisha_class_10_math_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/3304/2839/files/89408794057.pdf
    • https://cdn.shopify.com/s/files/1/0436/0221/5074/files/junumadubin.pdf
    • https://cdn.shopify.com/s/files/1/0432/1817/4107/files/natepefumoxanuga.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sujaxitedidubabupopivup.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b01.bin
6cd4da26c9bc64b5919e82ee5ada6793fce59ed69bdc8c08bc30bc03cfb6dae0
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B01 5464 bytes
font_01_sfnt_off00005d77.bin
ba99124ef789b1fd2b7bd818e6a17ab2a0595b8fc2498f04adac7172bbb20997
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D77 10276 bytes
font_02_sfnt_off000080e8.bin
6d38ff9756b44e93370057f415a6b7525cfc4d36dc85ac4eaac6687eec13ddca
pdf-font-stream PDF embedded font (sfnt) at offset 0x80E8 16084 bytes