Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6b3707a2366efc4…

MALICIOUS

PDF

46.4 KB Created: 2020-08-26 23:42:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa377943dab1838ec186a675e5e81a72 SHA-1: c928c0b0341bb07233fb7e7f894a35a4817eda2f SHA-256: d6b3707a2366efc49e208aa099f47903d5f17659b5f61fdd34d4805bf95e99b2
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The embedded URL 'https://ttraff.com/pify?keyword=fly+a+little+higher' is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL and numerous other links hosted on Shopify and other domains, suggesting a large-scale distribution effort. 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.com/pify?keyword=fly+a+little+higher
    • http://files.georgiahormones.com/uploads/1/3/0/7/130739696/4758346.pdf
    • http://fumodo.bridgewanganui.com/uploads/1/3/1/4/131453453/notewezagamemov_bodiwolekop.pdf
    • http://kejodafo.jordanscott.com/uploads/1/3/1/4/131453541/c6291.pdf
    • http://wusiwakup.katjakleinberg.com/uploads/1/3/1/4/131406934/e533b85d205.pdf
    • http://files.jimenavalenzuela.com/uploads/1/3/0/7/130776661/tasobenuzurid.pdf
    • https://cdn.shopify.com/s/files/1/0434/3490/1660/files/tutusadizutixirolorog.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vejumilaro.pdf
    • https://cdn.shopify.com/s/files/1/0435/0597/5462/files/mebudex.pdf
    • https://cdn.shopify.com/s/files/1/0437/8116/1121/files/japanese_opposite_words_list.pdf
    • https://cdn.shopify.com/s/files/1/0429/2447/4531/files/2439561710.pdf
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/amityville_horror_movie_2005_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/6559/0438/files/zawusizakelopivonugakute.pdf
    • https://cdn.shopify.com/s/files/1/0432/9478/5694/files/gakurubomef.pdf
    • https://cdn.shopify.com/s/files/1/0430/7343/7847/files/nenemulusumibefubiko.pdf
    • https://cdn.shopify.com/s/files/1/0435/3179/6632/files/amebic_liver_abscess_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0432/6277/1358/files/gijado.pdf
    • https://cdn.shopify.com/s/files/1/0434/5489/0149/files/nasepijukokawozarus.pdf
    • https://cdn.shopify.com/s/files/1/0433/1051/4334/files/sonefefolexokireminasod.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_off00007947.bin
f615ba6a4940d23627329f032f5386f93b8a790da2be196323fb00f589ec8413
pdf-font-stream PDF embedded font (sfnt) at offset 0x7947 4828 bytes
font_01_sfnt_off000089b3.bin
b2854fc64cf599a165eb7f98b93054d96111d8f2f43d3f164208a3264b43ca57
pdf-font-stream PDF embedded font (sfnt) at offset 0x89B3 10232 bytes