Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f553e8359194663…

MALICIOUS

PDF

56.5 KB Created: 2020-08-08 21:09:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b41f4991142f11bcbfcaff819e6dc42a SHA-1: 3df61b32880081897756bb68faf4594871eb3e9b SHA-256: 6f553e8359194663b4891475da47f72b9e85f683c8a2e7346ddcdc2d193dc01e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, includes text related to a 'barcode printer pdf' and the malicious URL, suggesting a lure. The presence of many external PDF links, some benign and some unknown, indicates a link farm strategy, likely to obscure the malicious destination or for SEO poisoning. No scripts were extracted, but the primary attack vector appears to be directing users to malicious infrastructure via embedded links.

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=tsc+te+244+barcode+printer+pdf
    • http://files.truedaring.ca/uploads/1/3/0/8/130874231/jegevuxafijatew-femurotixan-boriduberi.pdf
    • http://files.metermixdispense.com/uploads/1/3/1/1/131164573/numujak.pdf
    • http://files.ucsdnsysusymposium.org/uploads/1/3/1/6/131607103/wojodegu.pdf
    • http://files.lshb.org/uploads/1/3/1/1/131164573/8eb985b9b609f.pdf
    • http://www.opentle.org
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0876/1764/files/6991741360.pdf
    • https://cdn.shopify.com/s/files/1/0432/0821/2638/files/gefut.pdf
    • https://cdn.shopify.com/s/files/1/0432/3350/9534/files/36280636693.pdf
    • https://cdn.shopify.com/s/files/1/0431/6728/5410/files/21579742833.pdf
    • https://cdn.shopify.com/s/files/1/0433/0536/9758/files/fovugirunopejatenewike.pdf
    • https://cdn.shopify.com/s/files/1/0431/9641/6157/files/jiwuzosovuwivok.pdf
    • https://cdn.shopify.com/s/files/1/0431/3966/1986/files/dadesojujufolo.pdf
    • https://cdn.shopify.com/s/files/1/0436/7928/5401/files/pijebifa.pdf
    • https://cdn.shopify.com/s/files/1/0437/3823/5031/files/nudupuvusufovomuliroxuge.pdf
    • https://cdn.shopify.com/s/files/1/0433/3672/8734/files/cahier_de_vacances_gs_cp.pdf
    • https://cdn.shopify.com/s/files/1/0438/6599/7472/files/water_pollution_causes_effects_and_control_measures.pdf
    • https://cdn.shopify.com/s/files/1/0437/0392/6952/files/tuneluvituj.pdf
    • https://cdn.shopify.com/s/files/1/0429/8624/2209/files/putanupebefulawosozinid.pdf
    • https://cdn.shopify.com/s/files/1/0431/4316/8156/files/ca_medular_de_tiroides.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/
    • http://www.gnu.org/licenses/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000819e.bin
2507db4b5a3e2d286ed637a96942f3d5fc05c95ed35fe47ccd490a23fa05c9e3		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x819E 12556 bytes
font_00_sfnt_off00006f24.bin
535e88356d6a389fb465e136225531e2e383827c3ac66cef9422dac80f59c846		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F24 5428 bytes
font_02_sfnt_off0000a53b.bin
3db41b30b9058dd101b2a4d15cd6d78cad09ced12fb53849aaccf02e3572e576		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA53B 15144 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.