Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d9ba5c9264fd7b5…

MALICIOUS

PDF

40.9 KB Created: 2020-08-23 21:39:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac74ac7c19dbe7fb16d1e734c6e8bccc SHA-1: 74695df9302ffba4a50cf7893ea3dad4e0db5cb1 SHA-256: 4d9ba5c9264fd7b54b802119c22ead30ec0b10710a3ba1125998377648b6d2f2
150 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though obfuscated, contains text related to 'uscis form i 130 checklist' and a URL pointing to a malicious redirector. This suggests a phishing attempt to lure users to malicious content.

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/pify?keyword=uscis+form+i+130+checklist
    • http://pikodes.oxtedultrasound.com/uploads/1/3/1/3/131398367/883c7988f20.pdf
    • http://xivevu.tremormassagetherapy.com/uploads/1/3/1/0/131070581/85b27f958697d6.pdf
    • http://files.lakewoodactivities.com/uploads/1/3/1/3/131380480/relineta_wojabomakuj.pdf
    • http://didezur.schecktech.com/uploads/1/3/0/7/130739678/e350a.pdf
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/joindre_en_ligne_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0432/5061/4429/files/73148089009.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/tututerudujoga.pdf
    • https://cdn.shopify.com/s/files/1/0437/6051/7271/files/cecil_internal_medicine_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/6574/5312/files/wamurez.pdf
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/94686352225.pdf
    • https://cdn.shopify.com/s/files/1/0437/8463/4530/files/miwel.pdf
    • https://cdn.shopify.com/s/files/1/0433/9623/5415/files/naruto_shippuden_ninja_reborn_apk.pdf
    • https://cdn.shopify.com/s/files/1/0432/3662/2498/files/autocad_2010_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0428/6054/4156/files/41986104071.pdf
    • https://cdn.shopify.com/s/files/1/0431/7003/7911/files/perixadugavaj.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_off0000623b.bin
5c878b4cb8ab27175319b5ca4b60b18f11ed5159a82988ce036951552dc75431		 pdf-font-stream PDF embedded font (sfnt) at offset 0x623B 5324 bytes
font_01_sfnt_off00007439.bin
aef547d90912eaad38ca7f1450173d3de90d4a93c0b16de291c4433c4877855c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7439 10204 bytes

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