Malicious PDF — malware analysis report

Static analysis result for SHA-256 57099309d0eeeca9…

MALICIOUS

PDF

47.1 KB Created: 2020-07-30 15:31:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 706583b6bbf06c8f80f15877db54d162 SHA-1: 2615c8fc810bedbbbb777767ab084d90d05067cb SHA-256: 57099309d0eeeca914817769c391f1d2db6a2134a12d0e8a48ddc0722ea82918
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. Additionally, PDF_SEO_LINK_FARM suggests a large number of outbound links, likely for SEO manipulation or to host further malicious content. The embedded URL points to a redirector that appears to be related to job vacancy lures, which is consistent with the document body's content.

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=ibps+clerk+vacancy+2020+pdf
    • http://files.stfrancismf.org/uploads/1/3/1/3/131379395/2ad0640521.pdf
    • http://files.sitesofpassage.org/uploads/1/3/1/0/131071240/455213.pdf
    • http://files.pinewoodnaturopathic.com/uploads/1/3/0/7/130739621/dawimurazepob.pdf
    • https://cdn.shopify.com/s/files/1/0438/5007/2224/files/5571991337.pdf
    • https://cdn.shopify.com/s/files/1/0431/5129/4619/files/94551425909.pdf
    • https://cdn.shopify.com/s/files/1/0434/0364/0993/files/51378717526.pdf
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/rugopebuwidegurajuzaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/2160/6820/files/dikup.pdf
    • https://cdn.shopify.com/s/files/1/0437/6104/1569/files/faderuzemosada.pdf
    • https://cdn.shopify.com/s/files/1/0437/8152/1565/files/27361043975.pdf
    • https://cdn.shopify.com/s/files/1/0429/1071/1971/files/sesepozorabusele.pdf
    • https://cdn.shopify.com/s/files/1/0429/8761/8463/files/zewik.pdf
    • https://cdn.shopify.com/s/files/1/0436/8056/3350/files/99980553304.pdf
    • https://cdn.shopify.com/s/files/1/0432/1011/3186/files/daxejazofoku.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/10464485746.pdf
    • https://cdn.shopify.com/s/files/1/0435/4146/3189/files/nawavuziliwubiduwuzedumo.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_off00007b02.bin
0136ec6967194b82ea550bb8b52c4a6b9e1d905f68bdb213c80a3c87450c0636		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B02 5276 bytes
font_01_sfnt_off00008cf0.bin
4285ccbac82887be514909bd7671f13b3cfd424510ce987be4db66edf9a30359		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CF0 10004 bytes

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