Malicious PDF — malware analysis report

Static analysis result for SHA-256 538196f16e1a5a24…

MALICIOUS

PDF

42.0 KB Created: 2020-08-23 17:25:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54c47e787785fe575ff04ce953b30552 SHA-1: d3d637a1d289fe86c2791c5ad57e548e34202d1b SHA-256: 538196f16e1a5a24383723cabb855feb5b24f5355415ce92b1ef6e40f6377079
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the phrase 'Define approbation form' and the malicious URL, suggesting a lure to a phishing or scam site. The presence of numerous PDF links, many hosted on Shopify, indicates a link farm strategy to obscure the ultimate destination.

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=define+approbation+form
    • http://zixomot.makeyourselfunstoppable.com/uploads/1/3/1/8/131871745/zanirobiwanoku.pdf
    • http://files.godswaytshirts.com/uploads/1/3/2/3/132302815/7c24d7928c8eda5.pdf
    • http://vusepi.guqintables.com/uploads/1/3/1/3/131383664/347953117ed784b.pdf
    • https://cdn.shopify.com/s/files/1/0436/7758/1465/files/wunukebuzunoririxusik.pdf
    • https://cdn.shopify.com/s/files/1/0436/4750/0448/files/97149124994.pdf
    • https://cdn.shopify.com/s/files/1/0444/6837/1623/files/cardiomegalia_en_radiografia.pdf
    • https://cdn.shopify.com/s/files/1/0438/5826/4229/files/rifibibevopogavofenizi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6446/7357/files/91933756700.pdf
    • https://cdn.shopify.com/s/files/1/0429/7677/2250/files/novenozoxatopitapawukuwi.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0945/files/centuries_of_childhood_philippe_aries.pdf
    • https://cdn.shopify.com/s/files/1/0432/7469/8902/files/70133659999.pdf
    • https://cdn.shopify.com/s/files/1/0433/4678/8501/files/funusudemokovazonili.pdf
    • https://cdn.shopify.com/s/files/1/0431/3117/5063/files/1476582039.pdf
    • https://cdn.shopify.com/s/files/1/0431/4877/1488/files/most_of_us_wiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/5825/7306/files/ecg_valores_normales.pdf
    • https://cdn.shopify.com/s/files/1/0435/1367/5928/files/kovofijodunatinesukosud.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_off0000617f.bin
321a4d911cc643d2d5c5f1f9811264f52ea9dd5f27675503938e3fccb991d88a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x617F 4976 bytes
font_01_sfnt_off0000725c.bin
ea6674c3e1f951171e4e342679f1f32faed219a198a403cc8b83ffd93a9833cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x725C 12128 bytes

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