Malicious PDF — malware analysis report

Static analysis result for SHA-256 49c85ed051edfe79…

MALICIOUS

PDF

45.1 KB Created: 2020-08-14 12:38:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 149d92ae43feea6fcbfac59aca74f70b SHA-1: 5e3945bc6d64a8e4d63cfc6256111be6dd4d413a SHA-256: 49c85ed051edfe79bff282a338c106410b3b0f43a56b99e83615ebfb1fd42eb2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to distribute further malware or conduct phishing. The document body, though heavily obfuscated, contains the same lure text and URLs found in the heuristics, indicating a deliberate attempt to trick the user. The presence of a link farm further suggests an effort to manipulate search engine results for malicious purposes.

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=glass+castle+study+guide+quizlet
    • http://foluge.livingconscious.net/uploads/1/3/0/9/130969059/43d700a0f772e73.pdf
    • http://files.hillsideswimteam.com/uploads/1/3/0/9/130969424/poveki-pebukoveji-zokujojogepu-fodidupit.pdf
    • http://files.victoriamossremoval.com/uploads/1/3/1/1/131164027/3306130.pdf
    • http://jakujadok.bushlandbeauty.com.au/uploads/1/3/1/3/131378776/pebomozel_xebetuwobates_ranurolajaxu.pdf
    • http://files.cosmexmelbourne.com/uploads/1/3/2/8/132814427/tidetum_fusofit_telisapenexow_wonuxajatolexim.pdf
    • https://cdn.shopify.com/s/files/1/0441/4016/7320/files/2138494505.pdf
    • https://cdn.shopify.com/s/files/1/0430/7881/1810/files/53054932275.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/analytical_chemistry_skoog_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/7768/8743/files/purinejedapen.pdf
    • https://cdn.shopify.com/s/files/1/0434/1438/8888/files/46730898741.pdf
    • https://cdn.shopify.com/s/files/1/0431/5450/5882/files/ditudanukidoma.pdf
    • https://cdn.shopify.com/s/files/1/0435/7816/3359/files/asmaul_husna_dan_artinya_untuk_anak_anak.pdf
    • https://cdn.shopify.com/s/files/1/0434/4204/5089/files/ximapebimemejaja.pdf
    • https://cdn.shopify.com/s/files/1/0430/8297/3346/files/gobi_manchurian_recipe_in_malayalam.pdf
    • https://cdn.shopify.com/s/files/1/0434/5459/5224/files/70229883495.pdf
    • https://cdn.shopify.com/s/files/1/0432/9776/7592/files/29387455921.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_off00006a2b.bin
8412faaa739f59ca4bba305406b4aecaa35e33afcd0899fb73405840a5baa6cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A2B 5320 bytes
font_01_sfnt_off00007c5f.bin
847aae317abddb26e81c3c4e2cf505894eff56957d09e1a1dd5f397b5b127088		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C5F 13704 bytes

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