Malicious PDF — malware analysis report

Static analysis result for SHA-256 86582ef24370ece8…

MALICIOUS

PDF

40.9 KB Created: 2020-08-08 17:18:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 138bbec190ee15ba99c36bf99d330a52 SHA-1: 8ef8e6e07764ca5b2798baade04bbed4023c677d SHA-256: 86582ef24370ece8b2fedd667bb4cc9ffd82608b91cc7696689b1c6b18d6769e
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, 'https://ttraff.cc/pify?keyword=corellian+conflict+map+pdf', is identified as a malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The document body contains garbled text but includes the malicious URL, suggesting a lure to external 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=corellian+conflict+map+pdf
    • http://rikeg.lestudiosacredspace.com/uploads/1/3/1/4/131409090/zonulufurijenajuzoxi.pdf
    • http://files.louisecandlish.com/uploads/1/3/2/6/132682826/rilajidorapakakiv.pdf
    • http://files.rileymeadowsstable.com/uploads/1/3/0/9/130969061/jowuvex_fuborowikonore_burakimiwura.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/english_grammar_tenses_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4741/1096/files/nra_basic_pistol_course_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/0737/6546/files/brazzers_account_reddit.pdf
    • https://cdn.shopify.com/s/files/1/0432/0316/6369/files/ratekesev.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/38327237704.pdf
    • https://cdn.shopify.com/s/files/1/0434/5957/5958/files/gungeon_cog_of_battle.pdf
    • https://cdn.shopify.com/s/files/1/0433/9925/0072/files/wisabiwoxexerusu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5725/0455/files/dogatinezuwuz.pdf
    • https://cdn.shopify.com/s/files/1/0436/5543/0302/files/8422568179.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_off000063d3.bin
9f07b1d1c1790c5d3623de902f25dfa0f94bb477d902275680d2200ede74def9
pdf-font-stream PDF embedded font (sfnt) at offset 0x63D3 5028 bytes
font_01_sfnt_off000074d5.bin
0e226c39595fdbff85c536f23a8a509fe82a729c16d31eda29dad04f12e2d398
pdf-font-stream PDF embedded font (sfnt) at offset 0x74D5 10108 bytes