Malicious PDF — malware analysis report

Static analysis result for SHA-256 e280471a61f2df68…

MALICIOUS

PDF

53.4 KB Created: 2020-08-04 04:33:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7edd7ad9d75ab8bdfdbdb33bf969660 SHA-1: 789f014f1890e9daf693fcb94f41b4499b9357da SHA-256: e280471a61f2df68008b3f965acd59d9919d7f4815967679a78543ca2dd8a56d
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Capitalismo para principiantes pdf gratis' and the malicious URL, suggesting a lure to download a free ebook which instead leads to a malicious site. The ML classifier also strongly indicated maliciousness.

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.ru/pify?keyword=capitalismo+para+principiantes+pdf+gratis
    • http://files.briannalind.com/uploads/1/3/1/4/131413718/basugazemasa_ninapulewidu.pdf
    • http://files.adachiclinic.org/uploads/1/3/1/3/131379236/vesodamejuwefow.pdf
    • http://files.sellafurniture.com/uploads/1/3/1/3/131380445/f0b1c8d235a374e.pdf
    • http://files.renewedeachmorning.com/uploads/1/3/0/7/130739651/fogibomifefuzapij.pdf
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/kuvojulewufeneravowesubi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7317/4693/files/learn_japanese_language_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0432/4166/8775/files/75377285066.pdf
    • https://cdn.shopify.com/s/files/1/0433/6222/2232/files/kekozurofadeb.pdf
    • https://cdn.shopify.com/s/files/1/0431/0073/3596/files/14936797136.pdf
    • https://cdn.shopify.com/s/files/1/0433/9430/2117/files/92043871647.pdf
    • https://cdn.shopify.com/s/files/1/0430/6183/7981/files/fofosupujovanafiwileniwud.pdf
    • https://cdn.shopify.com/s/files/1/0431/0253/5840/files/vedapelunoxinobopaxurusa.pdf
    • https://cdn.shopify.com/s/files/1/0430/0436/2906/files/jufisukelavutuguvaluxuri.pdf
    • https://cdn.shopify.com/s/files/1/0437/6068/1109/files/letter_of_intent_for_internship.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58014629257.pdf
    • https://cdn.shopify.com/s/files/1/0435/9313/8333/files/29460318000.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000782a.bin
698c8e5411165e724a709b28b2bb8874653ea4596ca14bc332f9eb59d6410e73
pdf-font-stream PDF embedded font (sfnt) at offset 0x782A 5380 bytes
font_01_sfnt_off00008a5b.bin
72d43b8edd899e6a21eab5ad3984ed08386e3956a8d78a59545c230d1c4a753c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A5B 11944 bytes
font_02_sfnt_off0000b16c.bin
a2feab87ef65584a62b4d086a834922187f60c9a5d72718656d91ee12ab69c3f
pdf-font-stream PDF embedded font (sfnt) at offset 0xB16C 16292 bytes