Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dc1f5f476d0b399…

MALICIOUS

PDF

58.6 KB Created: 2020-08-30 18:59:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1961b576c7060dc638831dd347fe2b48 SHA-1: ba6d7097900d1aaa8e4c6d35a999a91091aaf014 SHA-256: 1dc1f5f476d0b39947e708ad903bb2e83e73edc07f8abee741a5378a4a2318a2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a prominent link that redirects to a known malicious domain, masquerading as research evidence. This is further supported by heuristics indicating a malicious redirector and a link farm, suggesting an attempt to drive traffic to malicious sites. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=blood+type+diet+research+evidence
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/45864620354.pdf
    • https://cdn.shopify.com/s/files/1/0434/7641/8720/files/python_copy_array.pdf
    • https://cdn.shopify.com/s/files/1/0429/5000/0791/files/fikas.pdf
    • https://cdn.shopify.com/s/files/1/0429/5278/6074/files/55476623316.pdf
    • https://cdn.shopify.com/s/files/1/0430/3015/1330/files/lamere.pdf
    • https://cdn.shopify.com/s/files/1/0432/1984/5277/files/33749816065.pdf
    • https://cdn.shopify.com/s/files/1/0436/3635/9326/files/10758599533.pdf
    • https://cdn.shopify.com/s/files/1/0464/9756/2776/files/dunuvamewowekozo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2348/3548/files/36330168616.pdf
    • https://static.usrfiles.com/ugd/e2c6c1_c89f185b5d3142ceb62326851bf4732f.pdf
    • https://static.usrfiles.com/ugd/06497e_ab9177e377d84fcf8706117e6e0f358c.pdf
    • https://static.usrfiles.com/ugd/b8c837_fb642f2e8f87472d92571b067a601cef.pdf
    • https://static.usrfiles.com/ugd/b8c837_0fd2484c14884def85a5fb0ec61fbfc7.pdf
    • https://static.usrfiles.com/ugd/289c5e_cec4bc8cf66c473a945f2378c1595349.pdf
    • https://cdn.shopify.com/s/files/1/0431/9110/7742/files/bezixixisaro.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/68256153925.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000844f.bin
0d5ae760d906087b4d0a9e1e21fed87afc447137e634074cc3884708e6a6c400		 pdf-font-stream PDF embedded font (sfnt) at offset 0x844F 5160 bytes
font_01_sfnt_off000095db.bin
5d2edcb6f39d61e296b8f1cb7c9adb870082cc7b3bcbf54714c4b4f281410504		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95DB 10632 bytes
font_02_sfnt_off0000b9ef.bin
49436f94d5abf10ca6af8af9848174aab82dfe7bc58a5146411d238fd5c76648		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB9EF 16148 bytes
font_03_sfnt_off0000cee5.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE5 4324 bytes

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