Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd14741c5c2f947f…

MALICIOUS

PDF

42.5 KB Created: 2020-08-05 18:17:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9f51dce401d75d4c96594682b049e1e SHA-1: 44d28ea4772f5d070e2ece3b3cd29069c38b956d SHA-256: fd14741c5c2f947f0b192a2edcb0e0141f991dd0d2c081ae86e640fd66a30e44
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to what appears to be a link farm hosted on Shopify. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=mathematical+analysis+an+introduction+by+andrew+browder+pdf'. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are likely part of the lure.

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.ru/pify?keyword=mathematical+analysis+an+introduction+by+andrew+browder+pdf
    • http://files.sarahhoppe.com/uploads/1/3/1/3/131380728/ziloludize-zegosadubet-jiludezofidevuj.pdf
    • http://files.thecompassionateasskicker.com/uploads/1/3/2/6/132695365/tosapuzoze.pdf
    • http://mogapa.rbcrowtherco.com/uploads/1/3/1/3/131383297/2849804.pdf
    • http://vogaso.aquaticamarine.com/uploads/1/3/0/9/130968921/rikogesewajife-pegatogoson-nuvoru.pdf
    • https://cdn.shopify.com/s/files/1/0434/5472/6310/files/nenetaze.pdf
    • https://cdn.shopify.com/s/files/1/0429/6219/0499/files/17230045135.pdf
    • https://cdn.shopify.com/s/files/1/0437/7945/7175/files/book_of_biomagnetic_pairs.pdf
    • https://cdn.shopify.com/s/files/1/0430/8051/5738/files/cambridge_advanced_learner_s_dictionary_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/4074/3329/files/64759389284.pdf
    • https://cdn.shopify.com/s/files/1/0441/1149/5320/files/three_letter_words_in_english_with_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0432/5031/9517/files/nilorijinojav.pdf
    • https://cdn.shopify.com/s/files/1/0429/2558/8639/files/datagosowejavitufewiluweg.pdf
    • https://cdn.shopify.com/s/files/1/0437/3384/4119/files/38190087182.pdf
    • https://cdn.shopify.com/s/files/1/0439/3412/2139/files/7328800891.pdf
    • https://cdn.shopify.com/s/files/1/0431/1285/7754/files/wake_me_up_when_september_ends_chords.pdf
    • https://cdn.shopify.com/s/files/1/0430/0223/2983/files/jesefibumirowajagamopef.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/69651331918.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_off000064fa.bin
ec2093e2b0f93800237f8e71ba4e38327420928cf761561474cdee8112f7db78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64FA 5732 bytes
font_01_sfnt_off00007873.bin
4300e637ddaa840052267b57cd5d3260c0d057272f7aba98cc060f247c52e38e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7873 10892 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.