Malicious PDF — malware analysis report

Static analysis result for SHA-256 559c3a69d1835166…

MALICIOUS

PDF

33.4 KB Created: 2020-09-21 07:47:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8d71a69f476704e9e9e6ea238051193 SHA-1: 636653fca752102bdd1d734a56ccafd11fd6389b SHA-256: 559c3a69d183516650d2883e47c576b26d7f732204b564459d957873a9760998
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.me, which is likely intended to lead the user to a phishing or malware distribution site. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify, but at least one to a potentially malicious domain. The document body, though heavily obfuscated, contains the target URL and appears to be a lure related to a school alumni search.

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.me/wix?keyword=st+charles+west+high+school+alumni
    • http://finipa.jamestingey.com/uploads/1/3/0/9/130969140/9538576.pdf
    • http://mapidu.glctechco.com/uploads/1/3/1/1/131163981/9673716.pdf
    • http://bulute.louisashomemades.com/uploads/1/3/1/4/131407068/xemetofina.pdf
    • https://cdn.shopify.com/s/files/1/0436/9799/5944/files/jojemaxeguli.pdf
    • https://cdn.shopify.com/s/files/1/0440/4133/9030/files/oxeye_daisy_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0433/5812/6245/files/bevixawexova.pdf
    • https://cdn.shopify.com/s/files/1/0434/6350/8121/files/dr_ho_back_brace_phone_number.pdf
    • https://cdn.shopify.com/s/files/1/0429/8516/0857/files/zodaraxugewifewomo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0744/2072/files/28970845184.pdf
    • https://cdn.shopify.com/s/files/1/0436/1856/6306/files/falufulozevawiduxiv.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_off00004533.bin
ecf3cedbcb74d6f5a79680c114436bd3f92be0b2359f368499d28fe254165b2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4533 5408 bytes
font_01_sfnt_off0000577f.bin
1ee0a34ca4c7e97a16e2621dbc146201125ccf9df0c18d1f5dc97653f687d954		 pdf-font-stream PDF embedded font (sfnt) at offset 0x577F 9892 bytes

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