Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6579c3b72c487a7…

MALICIOUS

PDF

37.7 KB Created: 2020-08-20 18:43:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 507381aec1fd8393823c5e3e4a982cf6 SHA-1: bc3ed723039449e31dd2f254d322f051ecfe7132 SHA-256: f6579c3b72c487a73b2ccc2b292a3d5abe54bb64d8318224dcd551bfd01d1efe
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=lagu+harusnya+aku+dari+armada+band'. This URL is embedded within the document body, suggesting a social engineering lure. The file also exhibits characteristics of a PDF link farm, with numerous external links, some of which lead to unknown domains. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is the primary indicator of malicious intent.

Heuristics 3

  • 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.
  • 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=lagu+harusnya+aku+dari+armada+band
    • http://xevuxilu.surfacetoairsystem.com/uploads/1/3/1/6/131637814/3043209.pdf
    • http://vupiv.foxfieldrecoverymission.org/uploads/1/3/2/3/132302868/kanipuwubug.pdf
    • https://cdn.shopify.com/s/files/1/0430/1540/5725/files/43232352765.pdf
    • https://cdn.shopify.com/s/files/1/0439/8533/8526/files/stop_creative_cloud_startup_mac.pdf
    • https://cdn.shopify.com/s/files/1/0436/4392/8726/files/logical_reasoning_aptitude_questions.pdf
    • https://cdn.shopify.com/s/files/1/0434/0213/3656/files/bisobupigurekirat.pdf
    • https://cdn.shopify.com/s/files/1/0432/1008/0420/files/saperosemapudupifiju.pdf
    • https://cdn.shopify.com/s/files/1/0434/9929/0776/files/72227376806.pdf
    • https://cdn.shopify.com/s/files/1/0434/0721/2695/files/nonegupumidu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5147/5351/files/how_can_i_lower_my_internet_bill.pdf
    • https://cdn.shopify.com/s/files/1/0429/3168/3484/files/hotel_california_lyrics_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/6154/1014/files/cancer_epidermoide.pdf
    • https://cdn.shopify.com/s/files/1/0447/8294/4405/files/blank_tab_sheet_guitar.pdf
    • https://cdn.shopify.com/s/files/1/0428/3616/4774/files/dawenomuluf.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_off0000564d.bin
9f6de3df1cfd69e7ec51b954cb4718d9b939c2b4c87e94cd7cfa57b458900f72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x564D 5456 bytes
font_01_sfnt_off000068b4.bin
1d9aaaefe10256372acb394ada10480449708076572c246dd57bfc8d0b21803c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68B4 9720 bytes

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