Malicious PDF — malware analysis report

Static analysis result for SHA-256 3408e19abd66ded4…

MALICIOUS

PDF

57.6 KB Created: 2020-08-23 01:16:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8be71300223e140a0cc09f4cfe7cb56 SHA-1: 85f9f4fe71923ec95313941f0eb64e2322079709 SHA-256: 3408e19abd66ded49b94af73f127356c2c449ba02a5e2dc951b244b3ebd01e5e
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier also flagged this PDF as malicious. The embedded links likely serve to direct users to malicious sites, potentially for phishing or malware distribution, and the document body contains obfuscated text and URLs.

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=bhaiya+ji+audio+song
    • http://files.earthcraftpermaculture.com/uploads/1/3/2/6/132695568/tusikuximujeziw_sekesawifetaxol.pdf
    • http://files.healthyjuicedietlife.com/uploads/1/3/1/4/131452878/kifexigud.pdf
    • http://files.stonemountain-capital.net/uploads/1/3/1/3/131383943/sebixixuvukef.pdf
    • http://files.townofgeraldineal.com/uploads/1/3/1/4/131437969/9e2365ce3b.pdf
    • http://rerodup.bonnieleeanderson.com/uploads/1/3/1/4/131454035/6687949.pdf
    • https:///1,sap_id:albumartwork:https:///1
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0432/2240/1192/files/rapisaxaxalapadejig.pdf
    • https://cdn.shopify.com/s/files/1/0430/2353/2195/files/noxutapu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1117/7626/files/71614188844.pdf
    • https://cdn.shopify.com/s/files/1/0428/7909/0855/files/3577275934.pdf
    • https://cdn.shopify.com/s/files/1/0450/4836/5214/files/type_space_maintainer.pdf
    • https://cdn.shopify.com/s/files/1/0432/2436/7262/files/mera_bhola_hai_bhandari_bholenath_ringtone.pdf
    • https://cdn.shopify.com/s/files/1/0437/5517/6097/files/52129971002.pdf
    • https://cdn.shopify.com/s/files/1/0443/1344/4508/files/39693993311.pdf
    • https://cdn.shopify.com/s/files/1/0439/1777/0920/files/hunger_games_book_3.pdf
    • https://cdn.shopify.com/s/files/1/0438/1681/2706/files/freeman_biology_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0427/5562/1031/files/botexubomonawa.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072c7.bin
ecd6e82a09f7d008b655f0e6df74b99ef4f86d8ae4862a7f16779c2dfe52fae7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72C7 5184 bytes
font_01_sfnt_off0000846f.bin
978d5bf7ac35840262c878fb7a48b9d226aceb03d949e2e74d8b6ebb115d60ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x846F 15192 bytes
font_02_sfnt_off0000b38c.bin
e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB38C 16204 bytes
font_03_sfnt_off0000c8f6.bin
68643eca1c4bb86d135fe2ab869de10d7ae79176e708d6a512070a9315d89ba1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F6 4296 bytes

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