Malicious PDF — malware analysis report

Static analysis result for SHA-256 686969c4df8f9e3b…

MALICIOUS

PDF

49.4 KB Created: 2020-08-04 02:33:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e89171bbb01a366a138d98cb882fc02d SHA-1: 5cbf16c60ef12e98e609f560ab593bcd0dd0c4fb SHA-256: 686969c4df8f9e3b98588c83f58e8845af8aa7ed7aa5e393db0d5c85ac8eb424
194 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which point to potentially malicious redirectors or SEO link farms. The document body includes a URL that appears to be a lure for users searching for 'Surah al kahf full pdf', likely intended to trick them into visiting malicious sites. The presence of numerous PDF links and a high ML classifier score indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.com/pify?keyword=surah+al+kahf+full+pdf
    • http://files.gentlehomeservices.com/uploads/1/3/1/8/131871994/risojuf_pupuxododawa_tidis_kadiberogagu.pdf
    • http://fujenaluk.slcfaaa.com/uploads/1/3/2/6/132681352/sofovuva.pdf
    • http://files.overcomingandunderstandinghomosexuality.com/uploads/1/3/0/7/130738644/9386996.pdf
    • http://files.samanthamesserartist.com/uploads/1/3/0/8/130813301/tejatorod.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/3350/8512/files/13624198573.pdf
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/75955656706.pdf
    • https://cdn.shopify.com/s/files/1/0443/5696/0412/files/promotion_board_bio.pdf
    • https://cdn.shopify.com/s/files/1/0429/5557/1353/files/xazovedokalekulojimut.pdf
    • https://cdn.shopify.com/s/files/1/0435/4854/1079/files/denenosikuketima.pdf
    • https://cdn.shopify.com/s/files/1/0436/2086/0067/files/vutizujujiri.pdf
    • https://cdn.shopify.com/s/files/1/0430/4083/3690/files/jariwanef.pdf
    • https://cdn.shopify.com/s/files/1/0434/5328/4519/files/yanmar_tractor_parts.pdf
    • https://cdn.shopify.com/s/files/1/0437/1654/2632/files/daxonoje.pdf
    • https://cdn.shopify.com/s/files/1/0430/9581/8404/files/91413021775.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nisej.pdf
    • https://cdn.shopify.com/s/files/1/0430/0088/9507/files/wopexobip.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_off0000669b.bin
a7def89609746f06e5b91683b2ed77411574c4ebd47fee86012dabb7d76fa619		 pdf-font-stream PDF embedded font (sfnt) at offset 0x669B 5120 bytes
font_01_sfnt_off00007800.bin
eb28151e3cf3c9b2c57069ac4cf51d6561686d7cd3a938acf61bff4359ce6864		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7800 10164 bytes
font_02_sfnt_off00009ac8.bin
7190ae30d1cb1cee5550a015eae6ff3524f36017c75cd8ba601b6574af18c688		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AC8 18008 bytes

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