Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eaef05d0658c1d6…

MALICIOUS

PDF

64.5 KB Created: 2020-08-12 15:33:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e3709c7fae606030568d2615fdaaaf7 SHA-1: 5fd665067b462084b81648d40ccbb406620e072c SHA-256: 1eaef05d0658c1d6a97047f2d17c73fcf0a6d23207245e914f8447a520c1047b
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a large number of embedded links, including one pointing to a known malicious redirector. The primary purpose appears to be to lure users into clicking these links, which likely lead to phishing sites or malware downloads. No scripts were extracted from this sample, but the extensive link farm suggests a delivery mechanism for further malicious activity.

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.ru/pify?keyword=boltzmann+machine+pdf
    • http://files.thedinopark.com/uploads/1/3/2/7/132740415/6535022.pdf
    • http://files.weddingmarchioro.net/uploads/1/3/1/6/131606392/komesutigitadifake.pdf
    • http://juxidoxo.zbsbatmitzvah.com/uploads/1/3/0/7/130740044/gojovewulo.pdf
    • http://files.yconnyi.org/uploads/1/3/1/6/131637679/11e375d2a4261.pdf
    • http://files.grandeprairierugby.com/uploads/1/3/2/7/132740838/robixarew.pdf
    • https://cdn.shopify.com/s/files/1/0429/8607/8369/files/52116826564.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/38746106010.pdf
    • https://cdn.shopify.com/s/files/1/0437/6775/8997/files/oxford_bookworms_library_stage_1_the_wizard_of_oz.pdf
    • https://cdn.shopify.com/s/files/1/0450/4082/8566/files/introduction_to_computer_security_goodrich_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/1386/4615/files/nemamogezezawulemuxuromo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3727/7855/files/psychological_thriller_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/7659/1509/files/rubisutisi.pdf
    • https://cdn.shopify.com/s/files/1/0440/1332/2398/files/93710251688.pdf
    • https://cdn.shopify.com/s/files/1/0434/5410/3713/files/jemesikuvururaxojapiw.pdf
    • https://cdn.shopify.com/s/files/1/0429/6887/5157/files/tavigenosaziwe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0265/0014/files/case_study_apa_format.pdf
    • https://cdn.shopify.com/s/files/1/0433/6713/7438/files/94755325055.pdf
    • https://cdn.shopify.com/s/files/1/0434/0131/4454/files/96314991250.pdf
    • https://cdn.shopify.com/s/files/1/0432/7469/8912/files/sovazodujuvizebiteburu.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_off00009a04.bin
66e898ecf7625fbb5c124a274839afb0bf9bdd993a54ae84b0ce496c8e4c04fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A04 5220 bytes
font_01_sfnt_off0000aba1.bin
80ebced29ba3409e056c47bbd7b22bf5d2b03c24cff8788c0843aa081944b5f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABA1 16424 bytes
font_02_sfnt_off0000df2a.bin
e14974f0870454f0d27ba76c083f831693e8089a4b1d1aecf211a3af7a173f3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2A 16148 bytes

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