Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b7f567b48a57690…

MALICIOUS

PDF

45.1 KB Created: 2020-08-23 03:40:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b06524117d83146e8ab13678046737fc SHA-1: dc5ee46ae2bfb90a394bc6787db6a010b11a0396 SHA-256: 1b7f567b48a5769083f5638690c2b0a7b60fd7b0b6397f4ee0f8f6d55d051b74
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=believe+in+love+riddim+mix'. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on cdn.shopify.com. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body was heavily obfuscated, but the presence of the malicious redirector is the primary indicator of malicious intent.

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.ru/pify?keyword=believe+in+love+riddim+mix
    • http://tetuk.cassandras-corner.com/uploads/1/3/0/7/130739206/kokewivegegobonevow.pdf
    • http://files.gotericreativearts.com/uploads/1/3/0/7/130776254/kikopoker_xutovade.pdf
    • http://pujelopa.icbnz.org/uploads/1/3/2/6/132682883/7052725.pdf
    • http://files.rowlandhallsummer.org/uploads/1/3/0/7/130740323/6635050.pdf
    • http://files.johankoegelenberg.com/uploads/1/3/0/7/130739343/5334527.pdf
    • https://cdn.shopify.com/s/files/1/0427/8065/5775/files/74097146491.pdf
    • https://cdn.shopify.com/s/files/1/0435/2521/0263/files/attributes_of_god_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/0831/8878/files/71004249015.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/wizidagudi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7301/1865/files/example_of_bibliographic_essay.pdf
    • https://cdn.shopify.com/s/files/1/0428/5209/0022/files/ca_foundation_accounting_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/5420/3031/files/rapid_sand_filtration_process.pdf
    • https://cdn.shopify.com/s/files/1/0433/1021/9432/files/61479175165.pdf
    • https://cdn.shopify.com/s/files/1/0430/5109/0077/files/12222014661.pdf
    • https://cdn.shopify.com/s/files/1/0433/8748/6358/files/stand_by_me_prince_royce_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0462/1556/1370/files/biloselotosotuberarolepu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0783/5303/files/fekubosifosevu.pdf
    • https://cdn.shopify.com/s/files/1/0427/8714/3839/files/8893156684.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/39671225646.pdf
    • https://cdn.shopify.com/s/files/1/0435/2425/9992/files/dusoj.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006103.bin
463fd7a7acb1f9fd17eec3a35d2a813cc5cfd583de6a350b8fe7414b434c5140		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6103 4468 bytes
font_01_sfnt_off00007006.bin
c73c310c4590e2a473a60206387448cd051b6d4e4e6059305c6322924b0a1296		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7006 12996 bytes
font_02_sfnt_off0000994b.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x994B 4324 bytes

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