Malicious PDF — malware analysis report

Static analysis result for SHA-256 61b84d93d62ec069…

MALICIOUS

PDF

47.8 KB Created: 2020-08-25 14:05:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d0530af81f7bfa79922fa763f2a1835 SHA-1: 3bb6a8f7fa6bf64dbb76abd39d27965eccc09c59 SHA-256: 61b84d93d62ec069120e9e650ee0852e50ac0da23239447008c2fb301da88f6e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains text related to 'Injustice 2 mobile gear spreadsheet' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of a large number of external PDF links further indicates a link farm or redirection strategy.

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.com/pify?keyword=injustice+2+mobile+gear+spreadsheet
    • http://files.kohchangdiscovery.com/uploads/1/3/0/7/130775649/678d727d.pdf
    • http://files.stelizabethrap.com/uploads/1/3/0/8/130815026/823279.pdf
    • http://files.5ivezero.com/uploads/1/3/1/4/131437538/boxuzuzege-jamov-susaxozokusonir.pdf
    • http://files.cell-tissue.com/uploads/1/3/0/7/130775635/fbd5df629c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/1283/9834/files/ganpati_atharvashirsha_in_sanskrit.pdf
    • https://cdn.shopify.com/s/files/1/0432/0228/1633/files/cch_chuyn_hnh_nh_thnh_file_trn_iphone.pdf
    • https://cdn.shopify.com/s/files/1/0437/4007/0042/files/mewufab.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9381/files/66440040655.pdf
    • https://cdn.shopify.com/s/files/1/0438/4486/2114/files/adiemus_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/0737/5522/files/free_commendation_certificate_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/4460/9943/files/95458368570.pdf
    • https://cdn.shopify.com/s/files/1/0451/0826/5125/files/teleninovanapij.pdf
    • https://cdn.shopify.com/s/files/1/0429/0415/8375/files/ramari.pdf
    • https://cdn.shopify.com/s/files/1/0440/2973/9173/files/37241168047.pdf
    • https://cdn.shopify.com/s/files/1/0431/5149/1233/files/15756135830.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_off00006de3.bin
45ca9653ab30b403f9b13089e9220ceb2bed8322355325c5b67905267a6f4a0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE3 5656 bytes
font_01_sfnt_off000080e8.bin
dc90fe609d5a00e29f3d476d6e4dc06276fc96d04cbca4f36043b52e30abd510		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80E8 10360 bytes
font_02_sfnt_off0000a459.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA459 4324 bytes

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