Malicious PDF — malware analysis report

Static analysis result for SHA-256 c722ac3dfd234cab…

MALICIOUS

PDF

54.1 KB Created: 2020-08-14 02:50:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 797f3661fd4e3eb1d41225455735bcd5 SHA-1: d0596a8dc7e4f831efabd283da930ae2c405459d SHA-256: c722ac3dfd234cab5ace9781254545c6d019c6d203be2d8e8dd67c8f899f7d21
120 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to domains that appear to be part of a link farm. One of these links, 'https://ttraff.cc/pify?keyword=sheets+meaning+in+marathi', is known to redirect to malicious infrastructure. The document body itself is heavily obfuscated and contains the same suspicious URL, suggesting it is the primary lure.

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/pify?keyword=sheets+meaning+in+marathi
    • http://files.sefha.net/uploads/1/3/2/3/132303068/kitelejizimimokuzaxa.pdf
    • http://files.beyond-dog-training.com/uploads/1/3/0/7/130739239/b6c8dec160788.pdf
    • http://rulozinu.davidstabler.net/uploads/1/3/0/9/130969426/30bcd93.pdf
    • http://jijuwiso.onsceness.com/uploads/1/3/2/8/132814900/8753833.pdf
    • http://vorav.brightoncoffeehouseandtheater.com/uploads/1/3/0/8/130874666/e9c5a2c7d.pdf
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/xuxab.pdf
    • https://cdn.shopify.com/s/files/1/0439/9369/4366/files/easy_biscuit_recipes.pdf
    • https://cdn.shopify.com/s/files/1/0429/9712/1178/files/29421193566.pdf
    • https://cdn.shopify.com/s/files/1/0449/6562/6015/files/phet_balancing_chemical_equations_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/1267/0111/files/bell_407_flight_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/8538/9206/files/cricket_score_sheet_pdf_blank.pdf
    • https://cdn.shopify.com/s/files/1/0435/5407/8883/files/lupus_anticoagulant_test.pdf
    • https://cdn.shopify.com/s/files/1/0430/1121/1425/files/rikokub.pdf
    • https://cdn.shopify.com/s/files/1/0433/3151/8622/files/majefuxewov.pdf
    • https://cdn.shopify.com/s/files/1/0431/6663/0037/files/nogezekilowivulepusafiv.pdf
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/14469246188.pdf
    • https://cdn.shopify.com/s/files/1/0432/1456/9640/files/funaguledev.pdf
    • https://cdn.shopify.com/s/files/1/0429/5891/3689/files/wigutuvipite.pdf
    • https://cdn.shopify.com/s/files/1/0440/1194/6134/files/bernardo_nante.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000655e.bin
5b5d14abcc8fdc07ce52da0fbc8d0fd09675af1bdf51d6b2ea7ad6df2c2b1825
pdf-font-stream PDF embedded font (sfnt) at offset 0x655E 4848 bytes
font_01_sfnt_off00007596.bin
6a5517bd10d298fc95f1fdd2e039ddf04f4f5a255409174fc9c897bfa43e236e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7596 10188 bytes
font_02_sfnt_off00009869.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x9869 4324 bytes
font_03_sfnt_off0000a66b.bin
40f0f6b4ec82a00fb6509841d318d851bc3e07db7b3b8d680505c49d0f374a4f
pdf-font-stream PDF embedded font (sfnt) at offset 0xA66B 11324 bytes