Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a0609b3ef4e4f88…

MALICIOUS

PDF

48.1 KB Created: 2020-08-21 17:45:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a53efa0d220cd7b98d52083f4520bd6 SHA-1: 5ee66c804f4808b7a27c6546c4e43d0c9f842961 SHA-256: 2a0609b3ef4e4f8854a67bc1bd3a5b16422ee3d24858fcf9940236d06d20443a
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, including one pointing to a known malicious redirector at 'ttraff.com'. This redirector is likely used to obscure the final destination and deliver a malicious payload. The presence of a large number of external PDF links, many pointing to Shopify, suggests a link farm designed to improve SEO for malicious content. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=all+reaction+of+aldehyde+and+ketone+pdf
    • http://tofuwul.courtneyflats.com/uploads/1/3/0/8/130874050/zugigurabizaxet_nuzebobuxu_lumoxosiwop_nopix.pdf
    • http://files.rimbeychristianschool.com/uploads/1/3/0/7/130738748/a7c67d.pdf
    • http://vikisoko.kulaspirit.org/uploads/1/3/1/3/131379182/4f7cb6635be9fa5.pdf
    • http://derixuvow.beradiantbyrebecca.com/uploads/1/3/1/0/131069934/boxenalozo-wuvew-sozuxakowuma-zekuwap.pdf
    • http://files.bedayatlifecoaching.com/uploads/1/3/1/4/131438038/cc8812a02cd.pdf
    • https://cdn.shopify.com/s/files/1/0433/6081/3208/files/adobe_acrobat_to_word_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/5982/0182/files/bayes_theorem_examples_and_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/12959391314.pdf
    • https://cdn.shopify.com/s/files/1/0428/8764/3302/files/61772921444.pdf
    • https://cdn.shopify.com/s/files/1/0431/9664/5536/files/2015_lexus_es_350_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/2993/7832/files/nunalinojonumovipo.pdf
    • https://cdn.shopify.com/s/files/1/0429/3532/0735/files/8040677635.pdf
    • https://cdn.shopify.com/s/files/1/0430/1501/2511/files/niwuw.pdf
    • https://cdn.shopify.com/s/files/1/0438/5678/9664/files/bottleneck_theory_of_attention.pdf
    • https://cdn.shopify.com/s/files/1/0431/6676/1120/files/sipomapux.pdf
    • https://cdn.shopify.com/s/files/1/0440/7122/3446/files/euclidean_distance_formula.pdf
    • https://cdn.shopify.com/s/files/1/0430/6993/1673/files/minecraft_large_tree.pdf
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/kadun.pdf
    • https://cdn.shopify.com/s/files/1/0439/0017/4504/files/49772070617.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_off00007d9d.bin
12c4e7374039ed5b93759e9609bc9aeccf54fd12b8dd7633e9a517884103d2e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D9D 5220 bytes
font_01_sfnt_off00008f56.bin
9a48f92e2f43df026d3cc2474308625ec05af6ebfba88866a001cb885994beb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F56 10368 bytes

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