Malicious PDF — malware analysis report

Static analysis result for SHA-256 61d9588fe81cb4d7…

MALICIOUS

PDF

45.6 KB Created: 2020-08-24 22:12:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f5b766a5120621aec0b6c90292adbb9 SHA-1: df8446a8703f5a3542e52df676730416011b0f78 SHA-256: 61d9588fe81cb4d7ce0dd9e0a50316985f00ccf1f8d46f67094800dddfc1bc60
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL and appears to be a lure for song downloads. The presence of numerous embedded URLs, many hosted on Shopify, suggests a link farm or SEO poisoning attempt to distribute malicious content. While no scripts were explicitly extracted, the PDF structure and the malicious URL strongly indicate an attempt to lure users to a compromised site.

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=bezubaan+reprise+song++pagalworld
    • http://bodid.mercermovercompany.com/uploads/1/3/1/3/131383483/xujogej_xifojud_faxewano.pdf
    • http://wiwojolom.fiddleheadmarina.com/uploads/1/3/1/8/131871699/f773c4dee.pdf
    • http://files.inhomesalestrainer.com/uploads/1/3/1/4/131438460/c7063dd11.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0436/1401/1555/files/bsff_russian.pdf
    • https://cdn.shopify.com/s/files/1/0437/9590/6721/files/boney_m_gotta_go_home_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gotisirifiwixi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6308/3162/files/print_ithenticate_report.pdf
    • https://cdn.shopify.com/s/files/1/0435/5879/7463/files/3960571203.pdf
    • https://cdn.shopify.com/s/files/1/0450/3640/4900/files/zimsec_a_level_chemistry_notes.pdf
    • https://cdn.shopify.com/s/files/1/0438/6222/9142/files/69587856197.pdf
    • https://cdn.shopify.com/s/files/1/0437/4046/3255/files/complementariedad_de_las_bases_nitrogenadas.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31688109027.pdf
    • https://cdn.shopify.com/s/files/1/0433/9105/8083/files/shirley_phelps_roper.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/vpn_chrome_android_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/4903/3640/files/accounting_mcqs_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/0831/7850/files/lexoruwexagewe.pdf
    • https://cdn.shopify.com/s/files/1/0441/2493/0200/files/90983259753.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d16.bin
f84ae09867966c0ea155a5544ede45121898bb0eb89c8d8232e7af7c1b0ea76d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D16 5460 bytes
font_01_sfnt_off00006fc6.bin
c37771aba12f8c093ef152159506511488dbec50efff206a9e832e41097bf383		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC6 14080 bytes
font_02_sfnt_off00009c3b.bin
e9c53eb7f204cecb07922f15fc233e3dc3f1905fff31febaefcd372bd4d4850b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C3B 3320 bytes

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