Malicious PDF — malware analysis report

Static analysis result for SHA-256 990a5c2bd50d538e…

MALICIOUS

PDF

59.7 KB Created: 2020-07-19 21:03:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aba35e33d436327221fd3ed5840c2c90 SHA-1: da998fbc4eb9f11e2803f1274fb41170d68ad187 SHA-256: 990a5c2bd50d538e305e66da10af285cebb171620b8b170d5e3d102d0f10ddd2
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a high number of embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is ttraff.cc, which is used in conjunction with a keyword suggesting a lure. The document body is heavily obfuscated and unreadable, but the presence of numerous external links, including one to a known malicious redirector, strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/wb?keyword=is%20god%20mathematician%20pdf
    • http://files.thetrophyshopplus.com/uploads/1/3/1/3/131380177/6124696.pdf
    • http://files.trentoncyrus5.org/uploads/1/3/1/3/131380295/f9014c.pdf
    • http://files.store.wabashfriendscounseling.com/uploads/1/3/0/8/130814340/833a7f5.pdf
    • https://cdn.shopify.com/s/files/1/0430/7058/7029/files/taruxuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/1044/8798/files/34766209392.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xidab.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/74535711799.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31906594002.pdf
    • https://dolasexup.files.wordpress.com/2020/07/zodaxoruzono.pdf
    • https://baxejubox.files.wordpress.com/2020/06/15491967930.pdf
    • https://nodezebibun.files.wordpress.com/2020/06/38607803653.pdf
    • https://cdn.shopify.com/s/files/1/0432/9691/5621/files/fudekonopedavijodasuk.pdf
    • https://cdn.shopify.com/s/files/1/0432/8338/2427/files/54345775574.pdf
    • https://cdn.shopify.com/s/files/1/0432/5523/4710/files/4626821983.pdf
    • https://cdn.shopify.com/s/files/1/0431/5280/1954/files/tupuwupa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13139855908.pdf
    • https://cdn.shopify.com/s/files/1/0438/9571/8040/files/tijaredubafaluduligam.pdf
    • https://cdn.shopify.com/s/files/1/0433/7346/1669/files/gukaxi.pdf
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/95808458741.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/68513135127.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/
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31906594002

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ad22.bin
5590fe11857c796eaf10da91bae2f4495266130cd2056703cd29de83ed38f854
pdf-font-stream PDF embedded font (sfnt) at offset 0xAD22 5164 bytes
font_01_sfnt_off0000be93.bin
3d0f177e5d3bdc77f441a70ce9954d9b1ae19a8229d9a281a3722ca85aa065dc
pdf-font-stream PDF embedded font (sfnt) at offset 0xBE93 10244 bytes